Clue

Cover of Clue

Cover of The Secret Secret Passage

Cover of The Case of the Invisible Cat

Cover of Mystery at the Masked Ball

Cover of Midnight Phone Calls

Cover of The Clue in the Shadows

Cover of The Screaming Skeleton

Cover of Death by Candlelight

Cover of Revenge of the Mummy

Cover of The Dangerous Diamond

Cover of The Vanishing Vampire

Cover of Footprints in the Fog