An invitation from Cap Bailey, science teacher at Bayport High, to accompany him out West to Wild...

In 'The Missing Mitt,' the boys must help their teammate find his lucky mitt before the last game...

In a search for the missing Willard Grafton, Frank Hardy and younger brother Joe, encounter a gan...

In a series of hair-raising adventures both on land and undersea the teenage brother detectives p...

The handwritten will of a deceased world-traveler is strange and mysterious. Its cryptic instruct...

The famous young detectives Frank and Joe Hardy are caught up in a dangerous web of intrigue when...

When thieves hijack a collection of stuffed animals from a country auction, Frank and Joe Hardy p...

Caught in their motorboat the Sleuth by a sudden storm at sea, Frank and Joe Hardy are relieved t...

Why is a wealthy sportsman so frightened by the serpent design on a mysterious balloon that he be...

There is a crisis in Bayport! Soon the city will be without water! Every night, water strangely d...

Private investigator Fenton Hardy enlists the aid of his teenage detective sons in a search for a...

With two cases in tow, the Hardy boys look to Turner mill for clues. Determined to learn the secr...