Dr. Seuss was a famous author and illustrator who wrote many books for children. He wrote books that were fun, silly, and imaginative. His writing style was very unique, and he often used made up words in his stories. His stories also often have a lesson to teach readers. Most of his books are about animals and other creatures living in magical places. His most famous books include The Cat in the Hat, Green Eggs and Ham, Horton Hears a Who!, and How the Grinch Stole Christmas. He wrote over 60 books in his lifetime!