I. Asimov

The man is very impressed with himself. Normally, hubris and immodesty are a huge turn-off to me. In the case of this man, who has legitimately written and published hundreds of books, the vanity is justified.
One of the most fascinating things about Asimov's tale is how he accomplished his ridiculous feat of prolific writing: He spent almost all his time writing. He detested travel and a good many activities that most consider pleasurable. He attended conventions, and later in life joined in a few “good old boy” type social clubs, but for the most part, he read and he wrote for the majority of most days, from his teenage years to his deathbed. Astounding stuff.