The complete guide to paintball has some good info in, and if my memory serves me correctly, has some training drills in as well. Not a bad book, but I felt it aimed at the newer baller. As for the Paintball: Strategies and Tactics I would assume that it is full of clever things to do if playing in the woods. SUp Air had not even been thought of then and I amnot sure if conecpt fields were either!!! If you are not into the sup air scene, this is probabily a very good book. Beware though, it may not have aged well at all!
The videos and DVD's that are available are excellent and show games in great detail. You can learn a lot from watching the pros play. Its surprising really!
Good luck!