RE: good reef books?
Anything by Calfo, Fenner, Borneman, Sprung, or Delbeck is going to be good. It really depends on what you are looking for. Martin Moe's book, while dated, is the cornerstone of my library. Its really good on the basic science of reef keeping. The science never changes, just the interpretation.
Also, I have a set of the pocket reference books by Scott Michael and Ron Shimek that stay in my car. They are great for researching a critter when you are at a LFS and considering purchasing it. I encourage LFS owner to keep a set, and most do, but if you are at one that doesn't have them they are a great resource.
Sprung's Algae Problem Solver is a great resource. I keep it right next to the puter for times when someone is asking for help with a weird algae problem.
Gary
125 SPS, 75 gal. LPS/softie reef, 9 gal. Nano