Cam Jansen and the mystery of the Babe Ruth baseball /
Mystery of the Babe Ruth baseball.
David A. Adler ; illustrated by Susanna Natti.
- New York : Scholastic Inc., c1982.
- 57 p. : ill. ; 20 cm.
- Cam Jansen. .
Cam uses her photographic memory to identify the person who stole a valuable autographed baseball.