It's great detective work that's needed now. Bill, Peter and Joe are falsely accused of setting boats adrift and the whole river is against them. Only Dick, Dorothea and Tom Dudgeon are there to stand by their friends and they soon set to work to investigate the crimes and trap the real criminals.
- Limba : Engleza
- Data Publicarii : 24 Jun 1982
- Format : Hardback
- Numar pagini : 400
- ISBN : 9780224606394