Michael Pollan's "The Omnivore's Dilemma"

Michael Pollan's The Omnivore's Dilemma is a book about food that will cause you to re-think your dietary options and choices.  One of the first works to build a case for the "Buy locally, eat sustainably" approach to better nutrition. The discourse on the killing and eating of animals suffers from analysis to paralysis, but it will help anyone to work through that question personally, too.