I got this book to get me started with GDT for my year old Springer Spaniel. There's a lot of good dog psychology in there, very useful in understanding why they do what they do, but for me there's just not enough help on how to remedy existing problems. Would definitely use this when starting with a puppy I was just intending to work, but for me, with a pet dog who could just benefit with some extra training and stimulus to keep him happy and occupied, it's not that helpful. There are some nice tips in there, however, and the methods of positive and negative reinforcement are kind - no ear-pinching etc. Will be passing it on to a friend with a working 8-week old lab and I'm sure she'll find it very useful.