Arnold Stark Lobel (May 22, 1933 – December 4, 1987) was an American author of children's books, including the Frog and Toad series and Mouse Soup. He both wrote and illustrated those picture books, as well as Fables, for which he won the 1981 Caldecott Medal recognizing the year's best-illustrated U.S. picture book. Lobel also illustrated the works of other writers, including Sam the Minuteman by Nathaniel Benchley, published in 1969.