I'm currently reading this book and LOVE it! I've been a fan of Holyfield's from day one and really enjoy, now, reading the book in his own words. I was so engrossed in the book last night that I had to resist doing one of those all night reading sessions.
I paid the most attention to pro boxing when Evander was boxing and am one of his biggest fans (not to take anything from George, who I also liked ;-) but Holyfield was definitely my guy. Do read the book, it's great. He writes it in a way that I feel like I really know him in person :-)
"Becoming Holyfield: A Fighter's Journey" by Evander Holyfield with Lee Gruenfeld. Atria Books, 2008. I found my copy in WalMart while shopping for my art supplies.