Mo Willems was a writer and animator on Sesame Street, where he won six Emmys. He is a three-time Caldecott Honor winner for Don't Let the Pigeon Drive the Bus!, Knuffle Bunny, and Knuffle Bunny Too. He also won two Geisel Medals for There Is a Bird on Your Head! and Are You Ready to Play Outside? His many popular titles include Knuffle Bunny Free: An Unexpected Diversion; Hooray for Amanda & Her Alligator; Edwina, the Dinosaur Who Didn't Know She Was Extinct; and the New York Times bestselling Cat the Cat books. His forthcoming book, Happy Pig Day!, is the latest in his highly successful Elephant and Piggie series for brand new readers.