From the creator of the Cam Jansen mysteries comes a new chapter book series.Danny Cohen is not sure what to make of Calvin Waffle, a quirky and smart newfourth grader. When Danny convinces Calvin to use his brain power to help thebaseball team, they both have a chance to become heroes. Illustrations.

David A. Adler, a former math teacher and editor, is the author of more than two hundred books for young readers including the Cam Jansen Mysteries, the entire Picture Book Biography series and Don't Talk To Me About the War. He lives in New York.