Franklin W. Dixon

The disappearance of a young professor leads the Hardy boys to a mysterious seacave guarded by a hot-tempered hermit.

The Hardy Boys travel to Cape Breton, where they investigate the mysterious disappearance of the creator of a maze.

Frank and Joe shadow teen superstar Justin Carraway to figure out the identity of his mystery stalker before events turn deadly.

The Hardy brothers embark on a freighter trip under mysterious circrcumstances and find themselves involved with a smuggling ring.

An archaeological expedition in the West turns into a desperate attempt to capture robbers and an escaped convict.

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. Other unforeseen problems ensue when the teen-age sleuths become involved in their father's latest case. Fenton Hardy is tracking down a priceless ivory idol...

The theft of a collection of stuffed animals from a country auction draws Frank and Joe Hardy into a thrilling mystery.

Frank and Joe travel to Massachusetts where they investigate a death and other mysterious events occurring at an amusement park.

Frank and Joe, the Hardy boys, solve a mystery involving a magician, American secret agents, and international spy ring, and a Scottish castle.