The Three Investigators was an American juvenile detective book series first published as "Alfred Hitchcock and the Three Investigators." It was created by Robert Arthur, Jr., who believed using a famous figure like movie director Hitchcock would attract attention. The Three Investigators are Jupiter Jones, Pete Crenshaw and Bob Andrews.

Most of the mysteries involved investigation of baffling phenomena (e.g. an ancient Egyptian mummy that whispered and a human skull that talked).

The Three Investigators