The Classic HARDY BOYS™ Series

As a dedicated fan of The Happy Hollisters, you may already know that “Jerry West” was a pseudonym for author Andrew Svenson. But did you know that Andrew Svenson was also known as “Franklin W. Dixon,” author of The Hardy Boys?

From 1948-1975, Andrew Svenson was instrumental in the development of the entire classic Hardy Boys canon, volumes 1-58. As a partner in the Stratemeyer Syndicate and head of the Boys’ Series division, his fingerprints were all over the production of these books – from plotting, outlining, writing, and updating – ultimately creating the 58 classic Hardy Boy books that boys and girls still enjoy to this day.

Through a special arrangement with publisher Grosset & Dunlap, we are thrilled that we can offer his fans the ability to purchase these 58 classic Hardy Boys books directly from the Svenson family, either as brand-new individual volumes or via money-saving bundles! Perfect for boys and girls ages 9-15, these clean, wholesome mystery stories are packed with action, danger and excitement!

For fun we added this icon to 30 of the classic Hardy Boys books listed below. This fingerprint icon indicates a Hardy Boys title that Andrew Svenson either outlined, wrote, or revised. This is the ultimate Andrew Svenson/Hardy Boys collection! We hope you’ll enjoy them all!  Each individual volume is in a hardcover format (5″ x 7.63″) and is approximately 180 pages with illustrations. We also offer FREE shipping to addresses in the USA.

Discounts are automatically applied to the shopping cart.

Discounts per Quantity for Classic Hardy Boys Books

Quantity Price % Discount
3 - 4 $10.16 each 15%
5 - 9 $9.56 each 20%
10 - 57 $8.96 each 25%
Buy all 58! $8.37 each 30%

HB1. The Tower Treasure HARDCOVER

$11.95

The first book in the Hardy Boys series!

The Hardy boys’ summer is ruined by a red-haired robber striking all over town. No robbery is more devastating than of Tower Mansion, home to one of the wealthiest families around. To prove the mansion’s caretaker is innocent, the Hardy boys will have to solve the mystery of the stolen jewels before time runs out.

After a dying criminal confesses that his loot has been stashed “in the tower,” the Hardy Boys make an astonishing discovery.

HB2. The House on a Cliff HARDCOVER

$11.95

Frank and Joe are asked to help out their famous private detective father on his latest drug smuggling case, which sends them to an old house on a cliff to serve as lookouts. But when cries for help lure the boys inside the house, they realize they could be in more danger than they thought.

HB3. The Secret of the Old Mill HARDCOVER

$11.95

With two cases in tow, the Hardy boys look to Turner mill for clues. Determined to learn the secret of the old mill, Frank and Joe employ a clever ruse to gain entrance, only to find themselves trapped. How the young detectives extricate themselves from this dangerous situation and unravel mysteries will keep readers tense with suspense!

HB4. The Missing Chums HARDCOVER

$11.95

When the Hardy Boys set out to solve the mystery of their missing chums, they discover a gang hide-out on an island along the way.

HB5. Hunting for Missing Gold HARDCOVER

$11.95

Frank Hardy and younger brother Joe head to Montana, in search of hidden treasure, supposedly hidden near the small village of Lucky Lode. On the way to the town, and while there, the brothers’ life is threatened by an unknown enemy and they soon find themselves in a treasure hunting race against a band of ruthless gangsters.

HB6. The Shore Road Mystery HARDCOVER

$11.95

When the Hardy Boys eagerly agree to assist their friend Jack Dodd and his father in locating a family treasure, the two young detectives are unaware of the baffling complications that will arise. Deadly road traps, aerial ambush, a spider man and a suspect who carries a menacing cane harass the young detectives as they seek the triple solution to this perplexing and exciting mystery.

HB7. The Secret of the Caves HARDCOVER

$11.95

Triggered by the disappearance of a brilliant young professor, this mystery takes the Hardy boys first to Kenworthy College, where they find a puzzling message on an examination paper. But then, a new clue is unearthed that sends the young detectives to the Honeycomb Caves. After many dangerous encounters, Frank and Joe discover a powerful searchlight in one of the craggy caverns along the seacoast. In the brilliant white glare of the searchlight, the startling secret of the caves is dramatically revealed.

HB8. The Mystery of Cabin Island HARDCOVER

$11.95

With two mysteries to solve, Frank and Joe must climb aboard their iceboat the Sea Gull to reach Cabin Island, where a belligerent stranger orders them off. Sabotage to the boat, danger to themselves, and a ghostly prowler do not daunt the Hardy boys in their search for Johnny Jefferson and for clues to stolen antique medals. How the teenage investigators outwit a ruthless foe and succeed in solving both mysteries makes for mounting suspense in this brisk-paced adventure.

HB9. The Great Airport Mystery HARDCOVER

$11.95

Valuable electronic parts containing platinum are being stolen from shipments made by Stanwide Mining Equipment’s cargo planes, and Frank and Joe are called upon to assist their world-renowned detective father solve the baffling case. While posing as Stanwide employees, the boys look into the truth behind the chief pilot’s death at sea. The puzzling trail of clues leads the young sleuths to an uninhabited Caribbean island, but the final, and most startling, discovery is made in the boys’ home town of Bayport.

HB10. What Happened at Midnight HARDCOVER

$11.95

Frank and Joe race against time to retrieve a scientist’s top-secret invention before thieves get their hands on it. But the young detectives soon discover that they are involved in a mystery far greater in scope than just safeguarding the invention. When Joe is kidnapped, this incident starts Frank off on a chase that could end disastrously for him and his pals.

HB11. While the Clock Ticked HARDCOVER

$11.95

A banker who has been receiving threatening notes enlists the help of the Hardy boys. Before long, the young sleuths find themselves entangled in the investigation of a notorious band of thieves.

HB12. Footprint Under the Window HARDCOVER

$11.95

A plot to steal a top-secret instrument vital to the United States space program poses a challenging case for Frank and Joe Hardy.

HB13. The Mark on the Door HARDCOVER

$11.95

In their motorboat the Sleuth, Frank and Joe Hardy search Barmet Bay for a dangerous stranger who has stolen a valuable boat. Suddenly, in the eerie fog, they spot the craft drifting aimlessly out to sea. What happens next starts the young detectives and their pal Chet Morton on an intriguing adventure that takes them to Mexico and into the comparatively unexplored desert and mountain regions of Baja California.

HB14. The Hidden Harbor Mystery HARDCOVER

$11.95

Frank and Joe Hardy are asked to clear the name of Southern man Bart Worth, who is being sued for a story in his newspaper, which claimed a local family obtained their wealth through piracy and smuggling. During their investigation, the Hardys have their hands full, with close calls with a mysterious lake “monster” and the rumors of a long-lost treasure.

HB15. The Sinister Sign Post HARDCOVER

$11.95

In one of the most dangerous and intriguing cases of their careers, Frank and Joe Hardy help their father investigate a series of mysterious car accidents. Each of the drivers had seen a signpost marked DANGER shortly before his accident. The young detectives investigate, only to discover that the signposts have vanished. The attempted theft of a secret experimental motor and the kidnapping of a famous race horse are part of this thrilling case, which proves to be as sinister as the signposts themselves.

HB16. A Figure in Hiding HARDCOVER

$11.95

From the moment Frank is given a strange message, warning them against poor eye sight, to give to their father, Fenton Hardy, the boys are on the case once again. The boys are soon haunted by eye related signs and warnings, and deal with criminals known as the Goggler Gang.

HB17. The Secret Warning HARDCOVER

$11.95

Frank and Joe Hardy, help their father, Fenton as he looks into claims that million-dollar artifact was lost aboard a freighter that sank off Whalebone Island in Bayport. Some suspect defrauds against the shipping line’s insurance company, but whoever is at fault the Hardys are determined to get to the bottom of their latest mystery.

HB18. The Twisted Claw HARDCOVER

$11.95

A series of museum thefts launch the Hardy Boys on this baffling mystery. Rare collections of ancient pirate treasure are being stolen, so Frank and Joe are asked to stake out the Black Parrot, a suspicious freighter docked in Bayport Harbor. This whirlwind chase after a self-styled pirate king in the Caribbean stronghold of the Empire of the Twisted Claw makes a gripping tale of suspense and high adventure.

HB19. The Disappearing Floor HARDCOVER

$11.95

Once again Frank and Joe Hardy take on a puzzling case when their famous detective father asks the boys to assist him in tracking down a notorious jewel thief and his accomplices. The trail leads to the outskirts of the Hardys’ home town and to a weirdly guarded mansion on the old Perth estate. With their pal Chet Morton, the brothers must tackle the mystery of the mansion heir’s sudden death. A disappearing floor, a huge, savage-looking, hound, a galloping ghost, and a college professor’s startling invention are just a few of the strange elements that complicate the boys’ efforts to solve both mysteries.

HB20. The Mystery of the Flying Express HARDCOVER

$11.95

The new hydrofoil, the Flying Express, is a high risk to sabotage, after her owner’s business enemies stir up trouble in the public, so Frank and Joe Hardy are asked to guard the hydrofoil on her maiden trip. The brothers are soon involved in a much more complicated case then they expected, battling a gang of criminals, that operate by the signs of the Zodiac

HB21.The Clue of the Broken Blade

$11.95

Frank and Joe Hardy become involved in an intriguing mystery which revolves around their fencing master, Ettore Russo. Proof that Russo is the rightful heir to his grandfather’s estate hinges on retrieving the guard end of a broken saber lost many years ago in California. The young investigators’ quest is complicated by a bank robbery during which some of their father’s important records are stolen. A chase ensues in the grape-growing region of California as the boys engage in a dangerous game of hide-and-seek with the bank robbery gang.

HB22.The Flickering Torch Mystery

$11.95

Frank and Joe Hardy investigate mysterious airplane crashes and contraband uranium isotopes, near Bayport.
Hardcover; 181 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB23.The Melted Coins

$11.95

Frank and Joe Hardy help their best friend Chet Morton, after he is swindled from his money in a summer school scam. The Hardys suspect Zoar College, located nearby to the Seneca Indian Reservation, where they have been investigating a burglary, is involved in the swindle.
Hardcover; 180 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB24.The Short-Wave Mystery

$11.95

Over their ham radio, Frank and Joe Hardy pick up a coded message from an industrial spy ring. At the same time the brothers’ father, Fenton, is tracking down this same ring.
Hardcover; 176 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB25.The Secret Panel

$11.95

Another exciting mystery begins for Frank and Joe Hardy when they help a stranger who has had an accident with his car. The man introduces himself as John Mead, owner of a nearby estate. After he continues on his way, Frank finds an odd-looking house key which belongs to Mead. But when the Hardys try to return it, they learn that John Mead died five years ago! They are even more amazed when they find that the intricately carved doors in the dead man’s mansion have no visible knobs or keylocks.
While working on this mystery, the boys assist their detective father in tracking down a highly organized ring of thieves who are robbing warehouses of television and stereo equipment.
What happens when Frank and Joe discover that there is a link between Mr. Hardy’s case and the mysterious Mead mansion will keep the reader on the edge with thrills and suspense.
Hardcover; 177 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB26.The Phantom Freighter

$11.95

Frank and Joe Hardy embark on a freighter trip under mysterious circumstances and find themselves involved with a smuggling ring.
Hardcover; 181 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB27.The Secret of Skull Mountain

$11.95

Every night water is mysteriously disappearing from Bayport’s new reservoir near Skull Mountain. It’s up to Frank and Joe Hardy and a skilled team of engineers to solve the mystery, and save the city from a major crisis.
Hardcover; 177 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB28.The Sign of the Crooked Arrow

$11.95

While investigating a wave of jewelry-store holdups in their hometown, Frank and Joe Hardy are contacted by their cousin, and fly to her cattle ranch in New Mexico. Cowboys are mysteriously disappearing from Crowhead Ranch, one after another.
Hardcover; 178 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB29.The Secret of the Lost Tunnel

$11.95

Difficult assignments are nothing new to the Hardy boys and this one that takes them to the Deep South is particularly challenging. Their mission: to vindicate a long-dead Confederate general, disgraced during the Civil War because he was accused of stealing hidden gold belonging to a bank. Skillfully avoiding booby traps and flying bullets, the boys persevere in their perilous quest. The arduous search is full of surprises that will thrill all fans of the Hardy boys.
Hardcover; 174 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB30.The Wailing Siren Mystery

$11.95

Caught in their motorboat the Sleuth by a sudden storm at sea, Frank and Joe Hardy are helpless when the engine conks out. Drifting farther from shore amid the tumultuous waves, the boys are relieved to see the lights of a yacht. But their SOS is ignored. The shrill sound of a siren fills the night air. Moments later, a helicopter drops an object alongside the Sleuth. To the young detectives’ astonishment, it proves to be a wallet containing two thousand dollars. The next day their close pal Chet Morton rushes to the Hardys’ home to report that the Morton farm truck carrying a shipment of high-powered rifles belonging to his uncle, a big-game hunter, has been stolen. These two apparently unconnected events are clues in a tangle of mystery which turns out to be one of the detective brothers’ most exciting adventures.
Hardcover; 177 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB31.The Secret of Wildcat Swamp

$11.95

An invitation from Cap Bailey, science teacher at Bayport High, to accompany him out West to Wildcat Swamp on an archaeological expedition, triggers off a series of dangerous events for Frank and Joe Hardy. On their way West the boys and Cap have a near-fatal accident in a private plane which has been sabotaged. Though warned to leave the area, Frank, Joe, and Cap doggedly remain until they have caught the cunning ex-convicts they are up against in this swift-paced adventure.
Hardcover; 178 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB32.The Crisscross Shadow

$11.95

When a man selling leather goods door-to-door steals the key to their detective father’s file cabinet, Frank and Joe Hardy set out to track him down. An odd mark on a key case which the man sold to their mother leads the teenage sleuths to an Indian village, whose chiefs begs them to help him find valuable tribal possessions and the deed for his land. How Frank and Joe find the missing deed and Ramapan treasures, how they prevent the phony leather-goods salesman from carrying out a ruthless scheme and how they help their father solve the top-secret case he is working on for the U.S. government makes exciting reading for all fans of the Hardy boys.
Hardcover; 177 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB33.The Yellow Feather Mystery

$11.95

The famous young detectives Frank and Joe Hardy are caught up in a dangerous web of intrigue when they agree to help Greg Woodson search for his grandfather’s missing will. When Henry Kurt, the temporary headmaster of Woodson Academy, insists that he is to inherit the property from Greg’s grandfather, the case becomes even trickier. Frank and Joe must risk their lives several times before they solve the mystery of Yellow Feather and trap a sinister criminal who will stop at nothing – even murder – to satisfy his greed for money.
Hardcover; 181 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB34.The Hooded Hawk Mystery

$11.95

The young detectives receive a trained peregrine falcon as a gift that involves them in an exciting mystery. Imagine their astonishment when the swift-flying falcon brings down a homing pigeon carrying two precious rubies! Startling events that ensue indicate the gems are a ransom that has been paid for the release of a kidnapped student from India, who had come to the United States to complete his education. But Tava, the son of a wealthy industrialist, is still being held captive. Hoping to find a clue to Tava’s whereabouts, the Hardys try to track down the owner of the ruby-bearing pigeon. Their every move, however, is thwarted by the dangerous criminals not only involved in the kidnapping, but also in the large-scale smuggling of aliens from India to the United States. How Frank and Joe eventually outwit their adversaries climaxes this thrill-packed mystery adventure.
Hardcover; 180 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB35.The Clue in the Embers

$11.95

Tony Prito enlists the help of his detective friends Frank and Joe Hardy when a sinister stranger demands that Tony sell him the bizarre curio collection he has just inherited. While the boys are discussing this suspicious incident, the stranger, Valez, telephones and threatens Tony. That same afternoon the three boys collect the cases of curios at a freight station only for Joe’s life to be at risk on their way back to Tony’s house. The next day a seaman claims two medallions in the collection that coincidently go missing. Did Valez steal them? And what was their significance. Unraveling the clues in this exciting mystery takes the Hardys and their friends to a desolate region in Guatemala and straight into the hands of a gang of dangerous thugs.
Hardcover; 177 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB36.The Secret of Pirate’s Hill

$11.95

In a series of hair-raising adventures both on land and undersea the teenage brother detectives pit their wits against some of the most ruthless criminals they have ever encountered. It all starts when Frank and Joe are skin diving just for fun and the thrill of exploring the undersea world. Suddenly, deep in the waters that flow near the foot of Pirates’ Hill, a mysterious skin diver fires a spear through Frank’s air hose. From this moment on, danger is never far away. The very lives of the boys are at stake as they, along with the help of their pals, uncover a mystery involving an old Spanish cannon and a fabulous sunken treasure.
Hardcover; 178 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB37.The Ghost of Skeleton Rock

$11.95

A cryptic message from their famous detective father and a note concealed in a ventriloquist’s dummy lead Frank and Joe Hardy on a dangerous search to the tropical islands in the Caribbean. There the teenage detectives are constantly beset by vicious henchmen of a criminal mastermind. Danger stalks the boys’ every move, once in an isolated sugar mill, another time in a shark-infested sea. But when Frank and Joe come face to face with the ghost at Skeleton Rock, it will be as much of a surprise to the reader as it was to the young detectives themselves.
Hardcover; 177 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB38.The Mystery at Devil’s Paw

$11.95

When Frank and Joe Hardy receive a telegram from Tony Prito in Alaska telling them that his life is in jeopardy, they immediately make plans to fly to Tony’s rescue. Unknown enemies’ dog the Hardys and their pal Chet Morton even before they start the 4,000-mile journey. Puzzling questions lead the Hardys into dangerous sleuthing in the wilderness of Alaska and British Columbia. The astounding secret that the young detectives uncover, in the shadow of the forbidding mountain peak Devil’s Paw, winds up one of the most perilous adventures they have ever encountered.
Hardcover; 180 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB39.The Mystery of the Chinese Junk

$11.95

The Hardy Boys become owners of the Chinese junk Hai Hau. They head to New York City and go spelunking to break up a gang of criminals.
Hardcover; 184 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB40.The Mystery of the Desert Giant

$11.95

In a search for the missing Willard Grafton, Frank Hardy and younger brother Joe, encounter a gang of gang of criminals intent on defrauding the US government, and are lead across California and even into Mexico.
Hardcover; 182 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB41.The Clue of the Screeching Owl

$11.95

When dogs and people start to disappear, three young boys by the name of Frank Hardy, Joe Hardy, and Chet Morton hear screeches and screams in the night. When they arrive at Captain McGuire’s cabin at Black Hollow, they come to find him missing. They start to search for him throughout the woods and they only find clues such as, a flashlight, scraps of bright cloth, and two empty gun shells. The neighbor of Captain McGuire, Mr. Donner, thinks that the screams and screeches are from the witch who walks around Black Hollow at night seeking revenge. When the Hardy Boys decide to get a puppy, they had no idea it would lead them to the solution.
Hardcover; 177 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB42.The Viking Symbol Mystery

$11.95

The Canadian Northwest beckons Frank and Joe Hardy to mystery and adventure. It all starts when a French-Canadian trapper, Caribou Caron, makes a historical and valuable fin – a carved rune stone left by Vikings centuries ago near Great Slave Lake. When Caribou Caron attempts to sell the artifact to a representative of a museum, it is snatched by thieves. Like the intrepid Viking of old, Frank and Joe, with their close pal, Chet Morton set off on a perilous quest in the Northwest Territories to recover the valuable artifact before the robbers can decipher the symbols leading to the buried treasure.
Hardcover; 175 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB43.The Mystery of the Aztec Warrior

$11.95

The handwritten will of a deceased world-traveler is strange and mysterious. Its cryptic instructions are to deliver “the valuable Aztec warrior to the rightful owner, a descendant of an Aztec warrior.” Frank and Joe Hardy have only one slim clue to work with: the name of a complete stranger who can help. Despite the harassments, the threats, and the attacks made upon them, Frank and Joe unravel clue after clue in their adventure-packed search for the living descendant of the mighty Aztec nation which once ruled in Mexico. It takes as much high courage as clever deduction for the young detectives to defeat their ruthless foes and to decipher the fascinating secrets of the strange and mysterious will.
Hardcover; 178 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB44.The Haunted Fort

$11.95

A long-distance telephone call from Chet Morton’s uncle summons Frank and Joe Hardy and their staunch pal Chet to a summer art school, located near old Fort Senandaga which is reputed to be inhabited by a ghost. The young detectives’ assignment: recover two famous oil paintings stolen from the valuable Prisoner-Painter collection owned by Jefferson Davenport.
Mr. Davenport, millionaire sponsor of Millwood Art School, reveals that one of the famous Fort Senandaga pictures painted by his ancestor, General Jason Davenport, contains a clue to the hiding place of a priceless chain of gold.
Vicious threats and deadly traps beset Frank, Joe, and Chet as they search for clues to the stolen paintings and the gold treasure – a search that is complicated by a stormy feud between a proud Englishman and an equally proud Frenchman over the military history of the fort.
Hardcover; 176 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB45.The Mystery of the Spiral Bridge

$11.95

Frank and Joe Hardy are determined to bring to justice the vicious criminals who kidnapped their detective father while he was investigating sabotage of a road-building project in the Kentucky wilderness.
After Mr. Hardy’s amazing escape, the boys pick up a clue – the word “Felix” mumbled by their sick father in his delirium. When they discover that the dossier of a notorious ex-convict has been stolen from Mr. Hardy’s files, the two young sleuths are doubly spurred to action.
The trail leads them to New York City but ends abruptly in a cemetery! Stunned, Frank and Joe come upon another clue – a spiral symbol. Aided by their pals, the boys take jobs on the highway construction crew in Kentucky to try to track down the kidnappers and the nefarious saboteurs. But who among the crew is friend and who is foe?
In a desperate maneuver that almost costs them their lives, the Hardys bring to a spine-tingling close one of the most action-packed and suspenseful mysteries they have ever solved.
Hardcover; 177 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB46.The Secret Agent on Flight 101

$11.95

Rarely do magicians reveal their professional secrets. Consequently, Frank and Joe Hardy are amazed when a well-known magician, the Incredible Hexton, offers to reveal the secret of his “Vanishing Man Act” and invited Mr. Hardy to be the subject. When their detective father fails to reappear, his sons are convinced that something sinister is afoot, despite Hexton’s insistence that Mr. Hardy is playing a joke on them. While desperately searching for their father, Frank and Joe find themselves working with SKOOL, a U.S. organization of secret agents pitted against UGLI, an international ring of spies stealing government secrets domestically and internationally. The young detective’s gripping adventures culminate in a dramatic climax when they unmask the secret agent on Flight 101.
Hardcover; 176 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB47.The Mystery of the Whale Tattoo

$11.95

One exciting event follows another when Frank and Joe Hardy are hired to apprehend the pickpockets who have been plaguing Solo’s Super Carnival. When their friends Tony Prito and Biff Hooper exhibit a stuffed whale dug up at a construction project, they all but put the carnival out of business. In this thrilling mystery the young detectives pit their wits against a gang of thieves whose bizarre identification, a three-part whale tattoo, proves to be a nearly insolvable riddle.
Hardcover; 174 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB48.The Arctic Patrol Mystery

$11.95

Private investigator Fenton Hardy enlists the aid of his teenage detective sons in a search for a missing man being sought by an insurance company. All leads to the sailor’s whereabouts have petered out and the boys fly to Iceland, the man’s native land, hoping to find a new clue. From the moment Frank and Joe arrive in Reykjavik, the capital city of Iceland, they are in constant danger. In the spine-chilling pursuit that follows, Frank and Joe uncover a diabolical espionage plot that threatens the life of a U.S. astronaut and NASA’S moon project.
Hardcover; 176 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB49.The Bombay Boomerang

$11.95

Frank and Joe Hardy become involved in a case affecting national security when Joe dials a wrong telephone number and gets the Pentagon. Two words- “Bombay Boomerang”- that the boys hear before the line goes dead plunge them into a whirlpool of danger and intrigue. At the same time, Frank and Joe must save their father from a murderous gang stealing mercury shipments in the Baltimore harbor. With clues linking the mercury thefts to the top-secret Super S missile mysteriously stolen from a government arsenal. In a race against time, the three Hardys foil a diabolical scheme to create widespread havoc in the United States.
Hardcover; 180 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB50.Danger on Vampire Trail

$11.95

An assignment from their famous detective father to track down a ring of credit-card counterfeiters takes Frank and Joe Hardy on an exciting camping trip to the Rocky Mountains. But the cross-country trek with their pals Chet Morton and Biff Hooper is jinxed from the very first day. Strange happenings on a nearly impassable mountain lure Frank, Joe, Chet, and Biff to almost certain death before they discover the sinister reason for the danger on Vampire Trail.
Hardcover; 175 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB51.The Masked Monkey

$11.95

Frank and Joe Hardy are called upon to find a wealthy industrialist’s son who has mysteriously disappeared.
Did Graham Retson flee from his home because he was at odds with his father, or was he kidnapped? Finding the answer turns into something more dangerous and larger in scope than Frank and Joe ever bargained for. The only clue in the case leads the two young detectives to South America, where the intrigues of evil adversaries almost cost them their lives. Involved in this complex mystery are a fierce-looking monkey trained to be a killer, a school of voracious, man-eating piranhas, a ruthless gang of passport thieves, and a cleverly operated change-your-identity mill for criminals.
Only through their courage and perseverance do the Hardys solve one of the toughest cases they have ever tackled.
Hardcover; 178 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB52.The Shattered Helmet

$11.95

Danger is the name of the game when the Hardys agree to help their pen pal from Greece, Evan Pandropolos, search for a priceless, ancient Greek helmet. Years ago, Evan’s uncle had loaned it to a Hollywood movie company for use in a silent motion picture, but the treasured helmet had been lost.
At Hunt College, where Evan, Frank, Joe, and Chet Morton are taking a summer course in film-making, the boys are harassed by enemies who grow more and more vicious. Are gangsters hounding them to force Mr. Hardy to give up his investigation of an international crime syndicate? Or are the boys’ sinister foes also seeking the helmet?
Clues that the young detectives unearth keep them constantly on the move-from college campus to California and finally to Greece. In a sizzling climax the Hardys, Evan, and Chet match wits with their powerful enemies on the island of Corfu.
Hardcover; 180 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB53.The Clue of the Hissing Serpent

$11.95

Why is a wealthy sportsman so frightened by the serpent design on a mysterious balloon that he begs Frank and Joe Hardy to protect him? And who stole the ancient, life-size chess king which is to be presented to the winner of the world chess championship? These questions and others equally as baffling in this exciting mystery seem to defy explanations. On the ground and in the air Frank and Joe find themselves the targets of diabolical enemies. An odd clue that they discover leads them across the Pacific to Hong Kong. There the young detectives match wits with their adversaries. How they help the police smash an international criminal organization provides an electrifying climax to one of the most challenging cases the Hardy boys have ever tackled.
“The author wishes to thank Malcolm S. Forbes for his expert advice on ballooning in this story”
— First printing, copyright page
Hardcover; 181 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB54.The Mysterious Caravan

$11.95

When the Hardy Boys take a winter vacation in Jamaica, Joe finds an ancient bronze death mask washed up near their beach house during a violent storm. Helping the Hardys and their friends in this bizarre mystery is William, a Jamaican boy, who flies to New York with startling news, only to be intercepted and held for ransom-the death mask! Frank and Joe must rescue William, plunge into their father’s airline-ticket theft case, and fly into a maze of danger in Africa.
Hardcover; 182 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB55.The Witchmaster’s Key

$11.95

There is not time for explanations when Mr. Hardy telephones Frank and Joe from the West Coast and sends them flying off to England to help his old friend Professor Rowbotham. Their stay in East Anglia begins with a weird omen, as they witness the bizarre funeral of an old witchmaster. From then on, strange things happen. When the Hardys learn about the strange disappearance of Lord Craighead, the plot deepens. Danger follows them to Ireland as Frank and Joe survive a shipwreck and find a clue from a frightened white which that leads to the torture chamber of a black witches’ coven, all in search of the telltale Witchmaster’s Key.
Hardcover; 179 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB56.The Jungle Pyramid

$11.95

A million dollars’ worth of gold bullion has been stolen from the Wakefield Mint under strange circumstances. Mr. Hardy is asked to investigate but before long his life is threatened, and he asks Frank and Joe to help him. The boys fly to Zurich, Switzerland, hoping to get information at the Swiss Gold Syndicate and to find the man who has stolen a valuable ancient gold figurine from a New York museum. Their search on both counts seems futile as they return to the United States where they uncover clues that lead them to an adventure in the Yucatán jungle. But the Hardy’s travels lead to nothing but new doubts and nagging suspicions. And now their lives are in danger.
Hardcover; 180 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB57.The Firebird Rocket

$11.95

The launching of the Firebird Rocket is endangered when a famous rocket scientist disappears without a trace on his way to the Woomera Monitoring Station in Australia. Assigned to the case, Fenton Hardy tells his sons he needs their help. And Frank and Joe must turn down a request that they find the missing son of a prominent senator. With courage, wit, and clever detective work, the young detectives begin to close in on the enemy, only to discover that the tables have been turned. Captured by their cunning adversaries, the Hardys face certain death! Will they escape? Will the Firebird Rocket ever be launched?
Hardcover; 180 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)

HB58.The Sting of the Scorpion

$11.95

During Mr. Hardy’s investigation of a ruthless gang of terrorists, Frank and Joe witness an explosion in the sky near an airborne dirigible owned by Quinn Air Fleet. The young detectives look into a clue that takes them into a new animal park outside Bayport, where they are lured into a trap by an unknown enemy. Problems arise for the park owner as he receives pressure from a competitor and a real-estate firm to sell out. Strange occurrences at the park also frighten the visitors and animals. Frank and Joe take up the case despite fore warnings.
Hardcover; 180 pages; illustrations, only $11.95 (includes FREE Shipping in the USA!)