until he was drafted for military service in World War II, Keats took art classes when he could and worked at a number of jobs, most notably as a mural painter under the New Deal program the Works Progress Administration (WPA) and as a comic book illustrator. At Fawcett Publications, he illustrated backgrounds for the Captain Marvel comic strip. He spent his military service (1943–45) designing camouflage patterns for the U.S. Army Air Force. In 1947, he petitioned to legally change his name to Ezra Jack Keats, in reaction to the anti-Semitic prejudice of the time. Keats spent most of 1949 painting and studying in Paris, realizing a long-deferred dream of working as an artist. After returning to New York, he focused on earning a living as a commercial artist, undoubtedly influenced by his father's anxieties. His illustrations began to appear in Reader's Digest, The New York Times Book Review, Collier's and Playboy, and on the jackets of popular books. His work was displayed in Fifth Avenue store windows, and the Associated American Artists Gallery, in New York City, gave him exhibitions in 1950 and 1954. In his unpublished autobiography, Keats wrote, "I didn't even ask to get into children's books." In fact, he was asked to do so by Elizabeth Riley of Crowell, which brought out his first children's title, Jubilant for Sure, written by Elisabeth Hubbard Lansing, in 1954. To prepare for the assignment, Keats went to rural Kentucky, where the story takes place, to sketch. Many children's books followed, including the Danny Dunn adventure series, by Jay Williams and Raymond Abrashkin, and an ethnographic series by Tillie S. Pine and Joseph Levine, beginning with The Indians Knew. All told, Keats illustrated nearly 70 books written by other authors. In 1983, Keats died at the age of 67 following a heart attack. His last projects included designing the sets for a musical version of his book The Trip (which would later become the stage production Captain Louie), designing a poster for The New Theater of Brooklyn, and writing and illustrating a retelling of the folktale "The Giant Turnip." He never married and often said that his characters were his children. After his death, the Ezra Jack Keats Foundation, which he had established in 1964, became active. Under the administration of his close friends Martin and Lillie Pope, the foundation was dedicated to preserving the quality of Keats' books