Three junior detectives solve a mystery involving a collection of antique busts, a legacy, a strange letter, and a red ruby.
- ISBN10 0394864077
- ISBN13 9780394864075
- Publish Date 11 April 1992 (first published September 1969)
- Publish Status Active
- Out of Print 4 April 2001
- Publish Country US
- Publisher Random House USA Inc
- Imprint Random House USA Children's Books
- Edition New edition
- Format Paperback
- Pages 164
- Language English