For those interested in what we eat and how that has been manipulated by the food industry, both Big Agriculture and especially the food processing industry, might want to read Michael Pollen's "The Omnivore's Dilemna."  This is a book of incredible insight and is extremely well written (i.e., a good read.)  Pollen debunks a lot of myths and is, himself, skeptical of the implications of the "organic" sobriquet.  Organic farming is increasingly becoming Big Agriculture and as Pollen points out, monoculture agriculture, whether organic or conventional, is problematic.  Growing 500 acres of organic lettuce is not fundamentally different from growing 500 acres of lettuce grown conventionally - it might be chemical free and that's a good thing but the issues run far deeper, as Pollen points out.  His chapters on corn and how cheap, empty calories have come to shape the eating habits of our culture (and the obesity, diabetes and heart disease that come with it) are eye opening to say the least.  No matter what your stance on food, I would say this book is a thought provoking must read and I highly recommend it.