Duffy and the Devil (1973) is a book by Margot Zemach and her husband Harvey Fichstrom (as Harve Zemach). In 1974 it was a finalist for the National Book Award, Children's Literature and winner of the Caldecott Medal for illustration.The U.S. Library of Congress credits "a Cornish tale retold by Harve Zemach" and a British edition was published by Kestrel Books in 1974, which catalogs with the full title Duffy and the Devil: a Cornish tale retold. Source: Wikipedia (en)