David A. Adler is a former math teacher and author of more than two hundred books for children. He has collaborated on several science picture books with Anna Raff, including
Light Waves and
Magnets Push, Magnets Pull, both named finalists for the AAAS/Subaru SB&F Prize for Excellence in Science Books. He is also the author of the Picture Book Biography series and the Cam Jansen mystery series. He lives in New York.
Anna Raff is an acclaimed illustrator of children's books. She illustrated David A. Adler's
Simple Machines and
Things That Float and Things That Don't, which received starred reviews from both
Booklist and
Publishers Weekly. She lives in New York City.