This came up in a search on "paleo" in publication date sort. This
book is free only today.
Paleo Diet Pros and Cons: Quick and Easy to Read Guide about the
Positives and Negatives of the Paleo diet by EUGENE MONTGOMERY
http://www.amazon.com/dp/B008606WVM
The book concludes that the paleo diet (mostly as described by
Cordain) is not healthy (U.S. News & World Report's conculsions are
cited as fact) and the author clearly prefers the vegetarian diet.
This book is still free if you missed it the other day:
Happiness On The Cheap: Tips and Philosophies for Living a Rich Life
on a Lower Income by Jason Lovett
http://www.amazon.com/dp/B0085I0RAC/