The Secret of the Haunted Mirror (Alfred Hitchcock and The Three Investigators, #21)

The Mystery of the Magic Circle (Alfred Hitchcock and The Three Investigators, #27)

Is former movie star Madeline Bainbridge an innocent victim--or a target of revenge? Thieves have just stolen her valuable old films. And her memoirs have mysteriously disappeared before they could be published. Why would anyone want the aging actress to

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 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 Wandering Caveman (The Three Investigators, #34)

Three young sleuths investigate the disappearance of a caveman's bones from a museum and uncover skulduggery at a science foundation.

The Mystery of Death Trap Mine (Alfred Hitchcock and The Three Investigators, #24)

The Three Investigators, aided by their friend Allie, try to untangle the unusual circumstances surrounding an abandoned silver mine.

The Mystery of the Scar-Faced Beggar (The Three Investigators, #31)

A wallet dropped by a scar-faced beggar sets the Three Investigators on the trail of bank robbers.

The Mystery of the Creep-Show Crooks (The Three Investigators, #41)

The Three Investigators tangle with a couple of shady producers of horror films when they try to track down a runaway teenager.

The Mystery of the Trail of Terror (The Three Investigators, #39)

While accompanying Pete's inventor grandfather to New York where the old man plans to sell his new invention, the Three Investigators find themselves in the middle of a dangerous spy case.

The Mystery of the Blazing Cliffs (The Three Investigators, #32)

Wealthy eccentric Charles Barron is convinced that aliens are planning to fly to earth and take him away. The detective trio resolves to prove that Barron is being taken for a ride--but not by hostile aliens.