The Mystery of the Dead Man's Riddle (Alfred Hitchcock and The Three Investigators, #22)

The Mystery of the Smashing Glass (The Three Investigators, #38)

Three young detectives try to trap an invisible vandal who has been breaking car windows all over town.

The Mystery of the Shrinking House (Alfred Hitchcock and The Three Investigators, #18)

The Three Investigators solve a case involving an international gang of art forgers.

The Secret of Shark Reef (Alfred Hitchcock and The Three Investigators, #30)

Three young sleuths uncover a mystery buried since World War II when they come to the aid of a trouble-plagued environmentalist who is protesting the drilling of off-shore oil wells.

The Secret of Phantom Lake (Alfred Hitchcock and The Three Investigators, #19)

While picking up a load of junk, the boys acquire a trunk from an old ship. A journal from a crewman is hidden in the trunk, giving clues to find a treasure that he hid before his death.

The Mystery of the Purple Pirate (The Three Investigators, #33)

Searching for a legendary pirate treasure, the three investigators find a band of modern day pirates.

The Mystery of Wreckers' Rock (The Three Investigators, #42)

Eine willkommene Abwechslung für die drei ???: Als Reporter sollen sie über das rauschende Kostümfest auf der Insel Ragnarson Rock berichten. Doch der kleine Spaß entwickelt sich zum handfesten Fall. Spukt es auf der Insel? Wer will ihnen die Fotos ab

The Mystery of the Dancing Devil (Alfred Hitchcock and The Three Investigators, #25)

Three young detectives search for a stolen statue only to find that it has mysteriously come to life.

The Secret of the Crooked Cat (Alfred Hitchcock and The Three Investigators, #13)

With a clue provided by an unusual stuffed cat, The Three Investigators solve the mysterious troubles of an accident-prone carnival.

The Mystery of the Headless Horse (Alfred Hitchcock and The Three Investigators, #26)

When three junior detectives search for a valuable old Spanish sword lost since the Mexican War, the headless statue of a horse yields a clue.