Here's a small list of Authors to read as you start or continue on your own journey towards Food (World) Awareness:
Pamela Rice does an excellent job introducing the main issues. If you are new to this information, it will be shocking and embarrassing and sickening that humans are capable of such behaviour. Highly moving and motivating.
Michael Pollan is so calming to listen to. Nothing seems to phase him. And he knows his stuff. He has numerous books and DVDs under his belt. I would recommend anything of his.
Lierre Keith changed my mind about going vegan. Read "The Vegetarian Myth: Food, Justice and Sustainability" whether you eat or never want to eat meat. It's a book for everyone. She takes the highly charged issues presented by Pamela Rice and weaves it together into much larger and often surprising pictures. I would recommend you run, not walk, to get your hands on her book and make up your own mind. You can read Chapter 1 for free.
Joel Salatin is a champion farmer. He is so passionate about sustainability and runs his farm in such a logical way, you'd wonder why the heck isn't this the norm? Well spoken and grounded, he has authored a number of books about farming and his struggles against the industrial machine. I would spend my food dollars at his farm if I lived in the area. Luckily we have some pretty great ones around here who follow the same sustainable philosophy.