At Project Gutenberg Australia, they have Nutrition and Physical Degeneration Dr. Weston A. Price. Subtitled, A Comparison of Primitive and Modern Diets and Their Effects, it's guaranteed to be unlike any other book you've ever read.
It's only available as on-screen HTML. But don't worry about that for now. What I want you to do is scroll down and stop and see and read all 100+ of the photographs. Such as these two:
Click = big
You'll want to read it. It's a masterpiece.
I previously mentioned this book in Your Gums Can Kill You.