Michael Pollan has written quite a few interesting books on food and eating that I would definitely describe as being written for the general reader rather than the specialist. Check out this article on Mother Jones and then check out The Carnivore's Dilemma and The Botany of Desire at the book retailer of your choice!
Mother Jones: What surprised you as you researched In Defense of Food?
Michael Pollan: One surprise is how deeply the food system is implicated in climate change. I don't think that has really been on people's radar until very recently. Al Gore didn't talk about it at all; 25 to 33 percent of climate change gases can be traced to the food system. I was also surprised that those diseases that we take for granted as what will kill us—heart disease, cancer, diabetes—were virtually unknown 150 years ago, before we began eating this way.
"Michael Pollan Fixes Dinner" at Mother Jones