Theodor Seuss Geisel ( /suːs ˈɡaɪzəl, zɔɪs -/ ⓘ sooss GHY-zəl, zoyss -⁠ ; [2] [3] [4] March 2, 1904 – September 24, 1991) [5] was an American children's author and cartoonist . He is known for his work writing and illustrating more than 60 books under the pen name Dr. Seuss ( /suːs, zuːs/ sooss, zoo...