The three young sleuths solve a case of double identity while investigating the legend of Monster Mountain.
- ISBN10 0001600184
- ISBN13 9780001600188
- Publish Date September 1974
- Publish Status Out of Print
- Out of Print 16 October 2003
- Publish Country GB
- Imprint HarperCollins Distribution Services
- Format Hardcover
- Pages 160
- Language English