First off, read "80/10/10" by Dr Douglas Graham. This is sort of, the foundational text.
I began off by reading the works of early Natural Hygienists. Famous ones like Arnold Ehret died suspiciously making some believe that he was killed rather than prove the health benefits of this diet. Some articles are here: www.rawfoodexplained.com/science.html. This is an absolutely excellent resource. I haven't read through everything, but I particularly liked the way they explained fermented and cooked food as pre-rotted for you, and no longer living.
I enjoy the videos of Freelee & Durianrider who run the online forum www.30bananasaday.com/ (aka 30bad) which I frequent often. They're very in your face but they're passionate about what they believe in. Don't let it put you off if you don't dig it though.
Michael Arnstein is a competitive runner who feels the diet has lead to great improvements in his performance.
David Klein is a Hygienic Doctor and PhD who uses this diet to cure Colitis and Crohns. He has some great books and an inspiring personal story as well.
I'm sure there are a lot of other great resources out there. These are the ones that did it for me.
