I will never say I've "read a book that changed my life" but this one comes awfully close: "The China Study" http://en.wikipedia.org/wiki/The_China_Study ht

I will never say I've "read a book that changed my life" but this one comes awfully close: "The China Study" http://en.wikipedia.org/wiki/The_China_Study http://en.wikipedia.org/wiki/The_China_Study If you get a chance to read it, you'll find the studies of the effects of some animal proteins, specifically casein, on propensity to develop cancer when organisms are challenged by mutagens and carcinogens to be rigorous science and important for our daily lives. The book encourages eating vegan, which is not hard, just different, and is a diet whose positive health effects are supported by large scale epidemiological studies.