*Being Vegetarian (from the Dummies Series)
*The Ethics of What We Eat: Why Our Food Choices Matter by Singer & Mason
*Diet for a Small Planet by Lappe
*The China Study by T. Colin Campbell
And here's a list of my favorite cookbooks:
*Gourmet Vegetarian Slow Cooker: Simple and Sophisticated Meals from Around the World by Alley
*Fresh From the Vegetarian Slow Cooker: 200 Recipes for Healthy and Hearty One-Pot Meals That Are Ready When You Are by Robin Robertson
*Moosewood Restaurant New Classics by the Moosewood Collective
*How to Cook Everything Vegetarian by Bittman
*Vegetarian Times Complete Cookbook by the Vegetarian Times Magazine