I whole heartily recommend that everybody interested in diet and health purchase and read a copy of the book The China Study by T. Colin Campbell PhD. This one book has been the catalyst for so many people having their eyes opened to the benefits of plant-based nutrition.
The China Study was the largest study to date on nutrition and health. It has been referred to as the "Grand Prix of epidemiology" by The New York Times. Much of the materials in The China Study has been incorporated into the eCornell Certificate Program from Cornell University.