The one that was my "bible" was Ultrametabolism. That explains the science of how the different metabolic systems interact and what happens when one goes awry. I'm not sure that one fixes fatty liver, but it would help. To fix it, you need to work with a doctor who will monitor your liver readings so you know when it's done purging. Be as liver-friendly as possible until then. Another great book for elimination dieting is Feast Without Yeast -- lots of great recipes without common allergens.