This came up in a search on "paleo". This book is free only today.

The Paleo Dog - Improving Your Dog's Health with the Caveman Diet by 
Chris Carver
http://www.amazon.com/dp/B009LHQ4YO

These were also free yesterday:

Paleo Made Easy: A Simple Guide to Eating Like a Caveman and Losing 
Fat with the Paleo Diet by Ryan Turner
http://www.amazon.com/dp/B009BS03LS

CF Quiz - Interactive Trivia Book by Sue Antinoro
http://www.amazon.com/dp/B009SCPZII