Excellent. Thanks for the review. Guess I'll pick up a copy for myself.
Let me know if you need any suggestions on the weight training. Smart move. Not only is it important for injury prevention, but it will help improve your running economy.
If you think about simple physics, the amount of work you do is equal to force multiplied by displacement. Thus, if you are stronger then you can apply a greater force to the ground - and, you are displaced farther! If you cover a given distance in a faster time (i.e. speed/velocity), then you have improved! And, because you were able to accomplish it just by putting more force into the ground, there would be theoretically no change to your energy consumption - meaning that you're more efficient!!