Theodor Seuss Geisel (March 2, 1904 – September 24, 1991) was an American writer and cartoonist, most widely known for his children's books written under his pen name, Dr. Seuss. He published over 60 children's books, which were often characterized by imaginative characters, rhyme, and frequent use of trisyllabic meter. His most celebrated books include the bestselling Green Eggs and Ham, The Cat in the Hat, and One Fish Two Fish Red Fish Blue Fish. Numerous adaptations of his work have been created, including at least 11 television specials, 3 feature films, and a Broadway musical.