Rodale's Basic Natural Foods Cookbook: Charles Gerras, Editor. A PONDEROUS TOME of about 900 pages.
The American Vegetarian Cookbook from the Fit for Life Kitchen: Mariyn Diamond. Also not so small....500 pages.
Both have very good recipes that promote natural, healthy foods and lifestyle. The first one is a virtual, natural foods bible, it has so much info on everything, not to mention the scads of recipes.