Includes all 10 books (1990-1994 copyright):
- The Disappearing Stranger
- The Hidden Message
- The Creeping Shadows
- The Vanishing Footprints
- Trouble at Wild River
- The Mysterious Hideaway
- Grandpa's Stolen Treasure
- The Runaway Clown
- Mystery of the Missing Map
- Disaster on Windy Hill
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