Here's the ones I've had and read:
Serious Growth:Big Beyond Belief, by OTS- The Bulgarian method of adding mass, to me it was chronic overtraining, better suited for someone on MAJOR juice. I had paid fifty bux for it when it first came out some 7 years ago.
The Anabolic Diet, by Mauro DiPasquale- My second bodybuilding book, probably one of my favorite because it was the first diet that ever made me lean. It worked like a charm, but way overpriced because now you can get the same info online for free.
Priming the Anabolic Environment, by Will Brink- This book is a little old now, about 5 years, but it was easily the best book I had purchased about bodybuilding. Had specific protocols on postworkout nutrition, cutting, mass gains, sleep, supplementation, a little bit of everything in a very user friendly format. I gave it to a friend of mine some time ago and now I sort of regret it. Can't remember how much I paid though, but much better value than any other book I have ever purchased.
I've also read Arnold Schwarzeneggers Encyclopedia of Bodybuilding from cover to cover, very good for becoming familiar with working out and bodybuilding.
I once also borrowed a Vince Gironda book from a friend of mine that was also a great read. Can't remember the name of it but it had some great info.
The Poliquin Principles by Charles Poliquin which I photocopied almost every page out of is also one of my favorites for selecting workout routines. Charles, IMHO, is probably the best strength training, mass building coaches you can read about. His techniques are a no bullshit approach and are tried and true, although he himself even admits what he might recommend today might not be so tomorrow because of trial and error or new research.
I've also dabbled in books by Bill Pearl and Mike Mentzer but none really interested me so much as far as application (either way too much or way too little volume).