Author of Eating Animals, Jonathan Safron Froer is a dad who decided to find out the reality behind what he is feeding his child. The answers surprised him and resulted in this groundbreaking book about where our food comes from. It's getting lots of buzz and this is a video of his second appearance on Ellen.
You don't have to be a vegetarian to appreciate his book. In fact, when I read his book I was not vegetarian yet.
Here's a link to my review of the book if you want to check it out.