I have a couple of Harris' books, and I must say, so far this one is my favorite in terms of deep, broad information regarding the evolution of human foodways. The content is well cited, explained, and clearly thought-out. In addition to being a scholarly approach to an important universal subject, there are just tons of interesting little tidbits and factoids in here - the kind of things you want to post on Facebook with a "Did you know...?"
I recommend this for anyone studying food history, nutrition, or anthropology.