Okay, you probably knew that... but it's an important fact to begin with!
He threw a boozy party during the height of prohibition and got in trouble. He needed a pseudonym to keep writing for the magazine.
Dr. Seuss was for the books he both wrote and illustrated. Theo LeSeig was for books that he wrote without illustrating. Rosetta Stone was for one book he penned called Because a Little Bug Went Ka-choo!
You're wrong as the deuce/ And you shouldn't rejoice/ If you're calling him Seuss./ He pronounces it Soice. (via)
The rhythmic sound of the ship's engine was inspiration to writing an equally rhythmic text for a children's book.
He was kind of afraid of them. (via)
He won a $50 bet with his publisher for accomplishing this!
Its often questioned what Horton Hears A Who means in the first place, but when he was still alive, Dr. Seuss threatened to sue an anti-abortion group unless they removed his words from their letterhead. (via)