I got a sheltie puppy a few months ago, and even before that, I started reading as many books as I could about breeds, raising and dog behavior. I got this book after reading Cesar Millan's books, who recommends this book a lot. When you read it, you can notice its influence in Cesar's way. It's written in a easy-to-understand language, but not simplistic. Fogle uses a lot of references for everything he says, in addition to his own conclusions and personal experiences. Very nice book for those who are still experiencing the difficulties of their first dog, and for those who already are experienced but want to understand him better. For me, only negative point is black-and-white, with drawings instead of pictures, and a publishing date of 1992, making it hard to find his references. But still a book which proves its value when you see in practice what you've read.