Theodor Seuss Geisel (pronounced /ˈsɔɪs ˈɡaɪzəl/; March 2, 1904 – September 24, 1991) was an American writer and cartoonist, better known by his pen name, Dr. Seuss (often pronounced /ˈsuːs/ or /ˈsjuːs/, though he himself said /ˈsɔɪs/).[1] He published over 60 children's books, which were often characterized by his imaginative characters, rhyme and frequent use of trisyllabic meter. His most notable books include the bestselling classics Green Eggs and Ham, The Cat in the Hat and One Fish Two Fish Red Fish Blue Fish. His work has been adapted numerous times, including eleven television specials, three feature films and a Broadway musical.

Geisel also worked as an illustrator for advertising campaigns, most notably for Flit and Standard Oil, and as a political cartoonist for PM, a New York magazine. During World War II, he joined the Army to work in an animation department of the Air Force, where he wrote Design for Death, a film that later won the 1947 Academy Award for Documentary Feature.