The U.S. Navy Seal Guide to Fitness and Nutrition

I highly recommend this book for anyone seeking to improve themselves physically, or just get a solid understanding of how the body responds to exercise. The title of the book isn't just a selling gimmick. This book was actually written for Navy Seals to help improve and maintain fitness levels. The authors are extremely well credentialed and the book gives an excellent overview of training and diet for high-effort activities. The price is also very good at just $16.95. Available at Barnes & Noble and Borders.

I can attest to the book as well, good stuff. Buy it used.