Matthew Cordell has illustrated many books for children including works of poetry, novels, and picture books, like Bob, Not Bob!; Leaps and Bounce; and Rooting for You! He has also created numerous picture books himself including Hope, Wish, Dream; Hello, Neighbor! The Kind and Caring World of Mister Rogers; Bear Island; and Wolf in the Snow, which was awarded the 2018 Caldecott Medal. Matthew lives in suburban Chicago with his wife, author Julie Halpern, and their two children.