Five stories provide young detectives with clues to solving bizarre mysteries involving talking skeletons, evaporating men and cantankerous millionaries

Nine short stories featuring haunted houses.

Thirty-seven chilling exercises in the art of murder and suspense.

Sinister apparitions and other unnatural phenomena terrify unsuspecting citizens as avenging spirits seek retribution for their unhappy lives

An eerie moaning sound is coming from a cave where a young bandit disappeared many years ago. Ranchers nearby figure he must still be alive. The Three Investigators set out to explore the moaning cave and soon wish they had come armed with more than a flashlight! Part of a classic series originally published beginning in 1964.

The man who knew how -- The most dangerous game -- The treasure hunt -- Man from the South -- Puzzle for Poppy -- Treasure trove -- Yours, truly, Jack the Ripper -- The dilemma of Grampa Dubois -- The birds.