Not Convinced That You Never Have To Be Sick? Then Read:

You Can Be...Well at Any Age: Your Definitive Guide to Vibrant Health by
K. Steven, Whiting, Ph.D.:
http://www.amazon.com/exec/obidos/ASIN/0970130201

How to Get Well: Dr. Airola's Handbook of Natural Healing by Paavo Airola P.h.D, N.D.:
http://www.amazon.com/How-Get-Well-Airolas-Handbook/dp/0932090036

Death by Diet by: Robert R. Barefoot:
http://www.amazon.com/exec/obidos/ASIN/0963370332

The Food Revolution: How Your Diet Can Help Save Your Life and Our World by
John Robbins:
http://www.amazon.com/Food-Revolution-Your-Diet-World/dp/1573247022