Leo Dillon and Diane Dillon, a husband-and-wife team, created more than 100 book and magazine covers together as well as interior artwork. The Dillons won the Caldecott Medal in 1976 and 1977 In 1978 they were the runners-up for the biennial, international Hans Christian Andersen Award for children’s illustrators, and were the U.S. nominee again in 1996.