Canine Body Language – A Photographic Guide by Brenda Aloff. If you want to better understand what your dog is expressing, this book will give you a handy reference guide to reading dog body language. Some of the photos are a bit difficult to see what she is describing, but for the most part, it's very good. While you can learn a lot from this book, be prepared for an awful editing job. They must have been in a rush to get it to print as there are a lot of mistakes. It is a bit pricey and long (at 370 pages!) for the average dog owner, but if you are really interested in learning more about dogs and how to read them, this is worth adding to your collection.