Stuart J. Murphy is a visual learning specialist. A graduate of the Rhode Island School of Design, he has a strong background in design and art direction. He also has extensive experience in the world of educational publishing. Drawing on all these talents, Stuart J. Murphy brings a unique perspective to the MathStart series. In MathStart books, pictures do more than tell stories; they teach math. Stuart J. Murphy and his wife, Nancy, live in Boston. Holly Keller has illustrated a number of books in the Lets-Read-and-Find-Out Science series, including Be a Friend to Trees. She is also the author and illustrator of many picture books, including Island Baby and Horace. Ms. Keller lives in West Redding, Connecticut.