Theodor Seuss Geisel was an American writer, poet, and cartoonist most widely known for children's picture books written and illustrated as Dr. Seuss. He had used the pen name Dr. Theophrastus Seuss in college and later used Theo LeSieg, and once Rosetta Stone, as well as Dr. Seuss.
Geisel published 46 children's books, which were often characterized by imaginative characters, rhyme, and frequent use of anapestic meter. His most celebrated books include the bestselling Green Eggs and Ham, The Cat in the Hat, One Fish Two Fish Red Fish Blue Fish, Horton Hatches the Egg, Horton Hears a Who!, and How the Grinch Stole Christmas!. Numerous adaptations of his work have been created, including 11 television specials, four feature films, a Broadway musical and four television series. He won the Lewis Carroll Shelf Award in 1958 for Horton Hatches the Egg and again in 1961 for And to Think That I Saw It on Mulberry Street. 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 City newspaper. During World War II, he worked in an animation department of the United States Army, where he wrote Design for Death, a film that later won the 1947 Academy Award for Documentary Feature.
He was a perfectionist in his work and he would sometimes spend up to a year on a book. It was not uncommon for him to throw out 95% of his material until he settled on a theme for his book. For a writer he was unusual in that he preferred to only be paid after he finished his work rather than in advance.