For my money, you don't get any better than Thibaudeau or Dave Tate/Louie Simmons. Thib's books are great, although they don't give you an outlined ready-to-go training plan. Dave Tate and Simmons are fan-freakin-tastic when it comes to walking the walk. You just don't get any better than a 930 lb squat, and a 55 year old who STILL squats over 800. Even if you're not a powerlifter, they know how to get you BIG if you eat for it. They also know how to get you strong as well. You can tweak the programs for mass gain.
Checkout elitefts.com and look through their books. They also have training EFS booklets or "Manuals" which are geared towards outlining exercises and/or training cycles.
Anything by thibs is great IMO. I've got most of his books and I learn something new.
Most of all though, I'd recommend just going through the archives here at T-Nation. Pick an author and just read all their articles, then move on to another author. It's free and you learn a SHIT-TON. Reading that stuff cannot be over-stated. I've read all of the articles in the archives, and often still go back and re-read stuff from different articles.
A lot of author's writings change from time to time and thus all of their old articles are worth reading to get the whole flavor. Some periods I like more than others--for example, I personally don't like much that Waterbury writes currently, but a few years ago I think he had some great ideas that were really useful to me. Now, I STILL read his current stuff, just to see if I can pick up anything useful. Occasionally I do.