“Complacency Breeds Mediocrity.” In this field, continuing education is essential to stay on top of your game and constantly improve. These are some of the books and DVDs I have used to further my learning.
Maximum Strength: Get Your Strongest Body in 16 Weeks with the Ultimate Weight-Training Program by Eric Cressey
The program in this book was real eye opener for me on how to actually train for strength.
Athletic Body in Balance by Gray Cook
Gray Cook provides a good introduction to good movement patterns and assessment.
Functional Training for Sports by Michael Boyle
Another book that gets away from training muscles in isolation to improve performance.
The Core Performance: The Revolutionary Workout Program to Transform Your Body & Your Life by Mark Verstegen
If you thought core training meant work only on the six pack muscles, think again.
Intervention: Course Corrections for the Athlete and Trainer by Dan John
Dan John does a great job of getting to the point of training people to reach their goals.
Ultimate Back Fitness & Performance 4th Ed by Stuart McGill
A great resource on training to improve back pain
Low Back Disorders, Second Edition by Stuart McGill
Also good for back pain. A little more technical and less on the performance side.
Diagnosis and Treatment of Movement Impairment Syndromes by Shirley Sahrmann
More information that I will ever be able to use on how the body moves and functions.
Muscles: Testing and Function, with Posture and Pain by Kendall et. al
Provides info on weak, long, and short muscles with good anatomy.