The Mystery of the Coughing Dragon (1970) - Illustration for ''The Mystery of the Coughing Dragon'' by artist Harry Kane.The Mystery of the Singing Serpent (1972) - Front cover of ''The Mystery of the Singing Serpent''.The Mystery of the Coughing Dragon (1970) - Front cover of ''The Mystery of the Coughing Dragon''.The Mystery of the Whispering Mummy (1965) - Front cover of ''The Mystery of the Whispering Mummy''.The Mystery of the Headless Horse (1977) - Front cover of ''The Mystery of the Headless Horse''.The Mystery of the Screaming Clock (1968) - Front cover of ''The Mystery of the Screaming Clock''.The Mystery of the Laughing Shadow (1969) - Front cover of ''The Mystery of the Laughing Shadow''.The Secret of the Phantom Lake (1973) - Front cover of ''The Secret of the Phantom Lake''.The Mystery of the the Fiery Eye (1967) - Illustration for ''The Mystery of the the Fiery Eye'' by artist Harry Kane.The Mystery of the Silver Spider (1967) - Front cover of ''The Mystery of the Silver Spider''.The Mystery of the Death Trap Mine - Front cover of ''The Mystery of the Death Trap Mine''.The Mystery of the Silver Spider (1967) - Front cover of ''The Mystery of the Silver Spider''.The Mystery of the Talking Skull (1969) - Front cover of ''The Mystery of the Talking Skull''.The Mystery of the Death Trap Mine (1976) - Front cover of ''The Mystery of the Death Trap Mine''.The Secret of the Haunted Mirror (1974) - Front cover of ''The Secret of the Haunted Mirror''.