   GPU Gems 2 & GPU Gems 3
  Is GPU Gems 3 an sequel to GPU Gems or it contains GPU Gems 2??I want to buy one of this books, and I am asking is GPU Gems 3 enough or It is better to buy both of them.   
  I have first two (yet have to buy third). Depends on what you want. You can check out TOCs of all books if I am right. Then you can choose what you need.They are different, not updates.   ;  I have all 3 and they are all different... Each one is basically a bunch of different techniques.  I feel like they've gotten progressively more complicated (the third being the most complicated yet)   