This is probably one of my favorite books, but I'm not much of a reader. It's just really cool to see two really enthusiastic guys doing what they loved back in the wild west era of game development and becoming extremely successful at it. It's amazing that one guy (Carmack) single-handedly created the technology needed to have such a revolutionary experience on PCs. It's doubly cool that he's about to do the same thing twice in one lifetime (with Oculus).