Who's Afraid of Monsters? (Sesame Street)

Mary Tillworth has written more than 100 licensed books for children, including Colors Everywhere! and I Am Buzz Lightyear. She resides in Brooklyn with a long-haired calico cat whom she occasionally shaves, and she is especially proud of her excellent spice rack. View titles by Mary Tillworth

Joe Mathieu has illustrated countless books for children, including Big Frank’s Fire Truck, Sesame Street titles, books in the Cat in the Hat’s Learning Library series, and many more. View titles by Joe Mathieu