Alfred Hitchcock and The Three Investigators, No. 10: The Mystery of the Moaning CaveBy William Arden
- Author: William Arden
- Publisher: Random House Books for Young Readers
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.