The Humane Society of the United States (HSUS) has a review of Old Friends at the following link. Within the piece there is a link directly to Amazon.com. When you purchase the book there, the HSUS will receive a portion of the proceeds from your order.
In addition, HSUS featured a story on Old Friends in their "Pets for Life" email newsletter. The article first appeared in their magazine Animal Sheltering. You can read it here.