H.I.T. by Mike Mentzer and John Little Mike Mentzer's follow-up to his signature Heavy Duty  bodybuilding principles. H.I.T (High Intensity Training) limits the training time to about 40 minutes, even for high level athletes. Heavy weights and  short, very non-aerobic workouts. The late Mike Mentzer made headway's as a top bodybuilder in the 1980s, before overwork and speed pills led to his mental breakdown, which I guess serves as a warning to all - there is more to life than work. Coined the phrase and created the T-shirt "Steroids - The Breakfast Of Champions"  One advantage for martial artists is that when using HIT/Heavy Duty, you can make great gains in muscle, while not having to worry about aerobics - your martial art workouts will take care of that. 

Beyond Brawn by Stuart McRobert Sound training advice from one of the sport's long standing exponents. 

The New Encyclopedia of Modern Bodybuilding by Arnold Schwarzenegger, Mr. Olympia himself. Historical background, training routines. Motivational.