Sean Kleefeld has been a fan of comics as long as he can remember, having had his first letter published in 1988. After running a Fantsatic Four fan site for several years, beginning in 1996, he was named “Comics’ #1 Fan” by Diamond Comic Distributors in 2003. Kleefeld has had his work published by Marvel Comics and Titan Books, and he is credited in the "Jack Kirby: Storyteller" documentary. He maintains ongoing columns for The Jack Kirby Collector and MTV Geek. He wrote Comic Book Fanthropology, his first book, in 2009.