Another book I like is Daisy to the Rescue by Jeff Campbell. This book is a great conglomeration of over fifty stories of animals saving lives, animals rescuing people, and animal myths. So many animals! The stories in this book happen at all different times, from very recently to 9/11. The book also has facts to back up the stories, explanations of why the rescues happened, and short stories to further shed light on the topic. But this book isn't all dogs! Parrots, pigs, dolphins, cats, even gorillas and wolves save lives!
I would recommend this book to animal lovers, pet owners, and wanna-be vets.