Harry's vacation ends abruptly when Spy Master orders him to investigate a sea serpent off the coast of Bearmania.
- ISBN10 0684145847
- ISBN13 9780684145846
- Publish Date 1 January 1976
- Publish Status Out of Print
- Out of Print 12 November 2014
- Publish Country US
- Imprint Scribner Book Company
- Format Hardcover
- Pages 127
- Language English