BOOK REVIEW

Eat Right 4 Your Type: The Individualized Diet Solution to Staying Healthy, Living Longer & Achieving Your Ideal Weight
by Peter D'Adamo, N.D.

On this one I am directing you to an external link, and an indepth review of the Blood Type Diet by two Naturopathic Physicans, which I think says it all. The author of the blood type diet is also a Naturopathic Physician, so these reviewers are are his peers.

Here's another review from WebMD.