David A. Adler, a former math teacher, wants children to understand
how much fun math can really be. He and illustrator Nancy Tobin
have collaborated on two other books introducing math concepts,
Fraction Fun and Shape Up! Mr. Adler is also the author of the
acclaimed Picture Book Biography series for children, several
Judaica titles, and numerous riddle books. He lives with his family
in New York.
Nancy Tobin was born in Grand Rapids, Michigan, and later studied
at Kendall College. She is also the illustrator of How Tall, How
Short, How Faraway, and Shape Up! She lives in New Jersey.
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