The Three Investigators Series The Secret of Terror Castle The Mystery of the Stuttering Parrot The Mystery of the Whispering Mummy The Mystery of the Green Ghost The Mystery of the Vanishing Treasure The Secret of Skeleton Island The Mystery of the Fiery Eye The Mystery of the Silver Spider The Mystery of the Screaming Clock The Mystery of the Moaning Cave The Mystery of the Talking Skull The Mystery of the Laughing Shadow The Secret of the Crooked Cat The Mystery of the Coughing Dragon The Mystery of the Flaming Footprints The Mystery of the Nervous Lion The Mystery of the Singing Serpent The Secret of Phantom Lake The Mystery of Monster Mountain The Secret of the Haunted Mirror The Mystery of the Dead Man's Riddle The Mystery of the Invisible Dog The Mystery of Death Trap Mine The Mystery of the Dancing Devil The Mystery of the Headless Horse The Mystery of the Deadly Double The Mystery of the Sinister Scarecrow The Secret of Shark Reef The Mystery of the Scar-Faced Beggar The Mystery of the Blazing Cliffs The Mystery of the Wandering Caveman The Mystery of the Kidnapped Whale The Mystery of the Missing Mermaid The Mystery of the Smashing Glass The Mystery of the Trail of Terror The Mystery of the Rogues' Reuinion The Mystery of the Creep Show Crooks The Mystery of Wrecker's Rock The Mystery of the Cranky Collector The Three Investigators Series
