The Three Investigators is an American juvenile detective book series first published as "Alfred Hitchcock and the Three Investigators" but also expanded in Germany. It was created by Robert Arthur, Jr., who believed using a famous figure such as movie director Hitchcock would attract attention THE BOOK CONTAINS THE FOLLOWING PARTS:- The Three Investigators 01 - The Secret o The Three Investigators is an American juvenile detective book series first published as "Alfred Hitchcock and the Three Investigators" but also expanded in Germany. It was created by Robert Arthur, Jr., who believed using a famous figure such as movie director Hitchcock would attract attention THE BOOK CONTAINS THE FOLLOWING PARTS:- The Three Investigators 01 - The Secret of Terror Castle. The Three Investigators 02 - The Mystery of the Stuttering Parrot. The Three Investigators 03 - The Mystery of the Whispering Mummy. The Three Investigators 04 - The Mystery of the Green Ghost. The Three Investigators 05 - The Mystery of the Vanishing Treasure. The Three Investigators 06 - The Secret of Skeleton Island. The Three Investigators 07 - The Mystery of the Fiery Eye. The Three Investigators 08 - The Mystery of the Silver Spider. The Three Investigators 09 - The Mystery of the Screaming Clock. The Three Investigators 10 - The Mystery of the Moaning Cave. The Three Investigators 11 - The Mystery of the Talking Skull. The Three Investigators 12 - The Mystery of the Laughing Shadow. The Three Investigators 13 - The Mystery of the Crooked Cat. The Three Investigators 14 - The Mystery of the Coughing Dragon. The Three Investigators 15 - The Mystery of the Flaming Footprints.