I’m going to go with Scientific Principles of Strength Training. A lot of good stuff in there. I have Boris Sheiko’s book but haven’t started it yet. I’ve heard it’s not so great but I love his programming so picked it up anyway.
What are some others that are good, informative reads?
The New Encyclopedia of Modern Bodybuilding by Arnold himself.
My workout partner and I use this to design specific workout routines every 6 weeks or so, whenever we feel the need to change things up.
I own this one too, but haven’t opened it yet.