This book is a must read for any dog owner. This is not a training guide, so don't expect to learn commands. What you will learn is how to interact with your dog in a meaningful way. You'll learn what you are doing wrong, and how simple it is to do things right. I am a new owner of a 9 month old rescue puppy. He is more dominant than I was hoping for, but we fell in love with him and had to bring him home. Learning the principles behind calm-assertive energy, and how much our energy affects our dogs is priceless. I wish I'd known these principles when my sister's out of control dog was still alive. He was much loved and treasured, but I'm sure he could have had a better life if we'd understood these concepts. This is not a quick fix, nor a magic bullet, but valuable information every dog owner should take the time to learn.
If you are interested in learning to train your dog PLEASE look elsewhere. Cesar Millan teaches outdated and disproved training methods centered around being the "dominant pack leader". Dominance theory and training in domesticated dogs has been thoroughly disproved - for a better approach in dog training look for books by Patricia McConnell, Turid Rugaas, Jean Donaldson and Karen Pryor. If it was up to be I would burn all of these books just so people don't continue to use these training methods!