William Pène du Bois (1916–1993) was an American writer and illustrator who is best remembered for his books for young readers. He was one of the founders of The Paris Review and illustrated books by Jules Verne, John Steinbeck, Isaac Bashevis Singer, Charlotte Zolotow, and others. He won the 1948 Newbery Medal for The Twenty-One Balloons and received two Caldecott Honors for his illustrations for Bear Party and Lion.