Tad Hills is the author and illustrator of the New York Times bestselling picture books Duck & Goose and Duck, Duck, Goose. He has created four board books featuring the same characters: What's Up, Duck?, an ALA Notable Book; Duck and Goose, 1, 2, 3; Duck & Goose, How Are You Feeling?; and Duck and Goose Find a Pumpkin. He is also the illustrator of Waking Up Wendell, by April Stevens; My Fuzzy Friends; and Knock, Knock, Who's There? Tad Hills lives in Brooklyn with his wife, their two children, and a dog named Rocket.