When someone takes Justin's karate belt, his friends in Invisible Inc. try to determine a motive as they investigate the mystery.
- ISBN10 0606094741
- ISBN13 9780606094740
- Publish Date 1 September 1996
- Publish Status Out of Print
- Out of Print 3 March 2021
- Publish Country US
- Imprint Demco Media Inc
- Edition Turtleback School & Library ed.
- Format Hardcover
- Pages 48
- Language English