Hardy Boys 15: The Sinister Signpost
Hardy Boys 15: The Sinister Signpost

Author: Franklin W. Dixon

Publisher: Penguin

Published: 1936-09-01

Total Pages: 190

ISBN-13: 1101076291

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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.

The Sinister Signpost
The Sinister Signpost

Author: Franklin W. Dixon

Publisher:

Published: 1968

Total Pages: 196

ISBN-13:

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The Hardy boys and their father solve a mystery involving inexplicable crashes of highspeed race cars being used to test an experimental turbine motor.

Hardy Boys 52: the Shattered Helmet
Hardy Boys 52: the Shattered Helmet

Author: Franklin W. Dixon

Publisher: Penguin

Published: 1973-01-01

Total Pages: 193

ISBN-13: 0448089521

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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 Hollywood movie company for use in a silent motion picture, but the treasured helmet had been lost. Picking up foes along the way, the young detectives unearth clues that keep them constantly on the move—from their Greek college campus to California and finally to Greece.

Hardy Boys 18: The Twisted Claw
Hardy Boys 18: The Twisted Claw

Author: Franklin W. Dixon

Publisher: Penguin

Published: 1939-03-01

Total Pages: 193

ISBN-13: 1101076321

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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.

Hardy Boys 01: the Tower Treasure
Hardy Boys 01: the Tower Treasure

Author: Franklin W. Dixon

Publisher: Penguin

Published: 1927-06-01

Total Pages: 196

ISBN-13: 9780448089010

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A dying criminal confesses that his loot has been stored "in the tower." Both towers of the looted mansion are searched in vain. It remains for the Hardy boys to make an astonishing discovery that clears up the mystery and clears the name of a friend’s father.

Hardy Boys 23: The Melted Coins
Hardy Boys 23: The Melted Coins

Author: Franklin W. Dixon

Publisher: Penguin

Published: 1944-02-01

Total Pages: 193

ISBN-13: 1101076372

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Frank and Joe Hardy suspect that their best friend Chet Morton is the victim of a summer school swindle and offer to help get his money back. While probing a baffling burglary at the Seneca Indian Reservation in New York State they investigate Zoar College located nearby. A startling connection between the Zoar College swindle and the theft of the Seneca’s gold tribal relic Spoon Mouth propels the teenage sleuths into a series of perplexing and dangerous situations.

Hardy Boys 55: The Witchmaster's Key
Hardy Boys 55: The Witchmaster's Key

Author: Franklin W. Dixon

Publisher: Penguin

Published: 1975-12-01

Total Pages: 193

ISBN-13: 1101657324

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There is not time for explanations when Mr. hardy telephones Frank and Joe form 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.

Hardy Boys 56: The Jungle Pyramid
Hardy Boys 56: The Jungle Pyramid

Author: Franklin W. Dixon

Publisher: Penguin

Published: 1976-10-01

Total Pages: 193

ISBN-13: 1101076658

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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.

Hardy Boys 09: The Great Airport Mystery
Hardy Boys 09: The Great Airport Mystery

Author: Franklin W. Dixon

Publisher: Penguin

Published: 1930-05-01

Total Pages: 193

ISBN-13: 1101076240

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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.