While vacationing on a California ranch, three boys decide to investigate strange wails that come from a mysterious cave where a famous outlaw disappeared.
- ISBN10 0394864107
- ISBN13 9780394864105
- Publish Date 12 September 1985
- Publish Status Active
- Publish Country US
- Imprint Random House Books for Young Readers
- Edition Rev ed.
- Format Paperback (US Trade)
- Pages 160
- Language English