When someone takes Justin's karate belt, his friends in Invisible Inc. try to determine a motive as they investigate the mystery.
Scholastic Reader Level 4：The Karate Class Mystery
- 作者： Levy, Elizabeth、Brunkus
- 出版社： Scholastic
- 出版日期： 1996-09-01
- ISBN碼： 059060323X
- 編號： 11100626859
$ 123 元
原價 140