Masters of Doom
Looks like James blogged about Masters of Doom before I could get to it! :)
I just finished this book last night and was very impressed. Kushner did an incredible job learning the characters and telling their story. The book starts with Carmack and Romero's first day on a computer, and goes all the way until Doom III and Monkeystone Productions. I would highly recommend this book to anyone interested in game development, games, or how two guys created an empire in the gaming industry.
Jayme