Left alone when Rush and Mona go away to school, Randy and Oliver are lonely and bored until a mysterious letter brings the first of many clues to a mystery that takes all winter to solve.
- ISBN10 080507063X
- ISBN13 9780805070637
- Publish Date 1 September 2002 (first published October 1970)
- Publish Status Out of Print
- Out of Print 2 July 2021
- Publish Country US
- Imprint Henry Holt & Company
- Edition 3rd ed.
- Format Hardcover
- Pages 224
- Language English