David A. Adler is a former math teacher and author of more than two hundred books for children. He has collaborated on several math picture books with Edward Miller, including Money Madness and Triangles, which received two starred reviews. He is also the author of the Picture Book Biography series and the Cam Jansen mystery series. He lives in New York.

Edward Miller is a former children's book art director. He illustrates a variety of products for kids in addition to books. Follow him on Instagram @edelementary.