Identify the structure of each sentence. One of the most well-known and beloved children's book authors, Theodore Seuss Geisel, wrote under the pen name Dr. Seuss. Though he is best known for his children's stories, Dr. Seuss worked as a writer and cartoonist for magazines such as Life, Vanity Fair, and The Saturday Evening Post during the 1920s and 1930s. When World War II began, Dr. Seuss began drawing political cartoons, and he used his satirical cartoons to voice his strong support of the United States' involvement in the war. After the war, Dr. Seuss began to write children's books again; he wrote one of his most famous books for children, The Cat in the Hat, in an effort to encourage child literacy.