While attending a week-long family reunion on a California island, the Three Investigators find their photographs of the event hold an inordinate interest for someone else, and receive clues to that unknown identity from both an ancient and a modern boating accident.
- ISBN10 0394973755
- ISBN13 9780394973753
- Publish Date 12 September 1986
- Publish Status Remaindered
- Out of Print 10 May 2014
- Publish Country US
- Imprint Random House Books for Young Readers
- Format Hardcover
- Pages 184
- Language English