Danica McKellar is the New York Times bestselling author of the groundbreaking McKellar Math books, including middle school hit Math Doesn't Suck , and she has helped over two million kids excel in math with her entertaining books. She graduated summa cum laude from UCLA with a degree in mathematics and has published an original theorem, now known as the Chayes-McKellar-Winn theorem, in the prestigious Journal of Physics . She testified before Congress about encouraging women to excel in mathematics and was even named "Person of the Week" by ABC World News Tonight for her unique and valuable work as a math education author. Danica is also well known for an acting career spanning four decades, including roles on The Wonder Years , The West Wing , her popular holiday movies, and more. Josée Masse is the illustrator of the bestselling The Care and Keeping of You , and a recognized artist in her native Canada, having illustrated numerous French and American picture books. She began her career as a graphic designer. Josée lives and works outside Montreal.