There are some really great book ideas on this thread!
I liked the G.I diet by Rick Gallop. The book is based on the Glycemic index and is really good for losing weight. The book was recommended by a diabetic friend of mine.
more here: http://www.amazon.com/G-I-Diet-Rick-Gallop/
Perfect Health: The Complete Mind/Body Guide (2001) is another book that I really enjoyed. Deepak Chopra looks at the mind/body connection and how we can become healthy through living in tune with nature and other alternative healing paths.