This is one of the best dog training books ever written. It thoroughly covers many aspects of dog training -- both the general training goals every dog owner has (such as how to teach your dog to greet others politely, how to do sits and downs, and the like) as well as giving many protocols for retraining aggressive and at-risk-for-being-aggressive dogs. Thus, the title is a bit incomplete: I would recommend this book for EVERONE doing dog training, whether you have an aggressive dog or not (or, whether you know you do or not, as she also talks about early warning signs of aggression that most people miss and things that lead to aggression down the road).
The information is very thorough, yet also easy to follow. About half the book is how-to: step-by-step instructions on how to get your dog to give you his attention, how to get your dog used to being handled, how to get your snarky dog to tolerate being near other dogs, and much more. Yet there are also sections which are more theoretical and abstract, such as sections on learning theroy, different kinds of canine aggression, and excellent discussions of canine body language (which can alert you to impending aggressive behavior). So, it is very complete and well-rounded, useful and engaging for those wanting a how-to book and those wanting more general information on canine aggression.
The book also discusses management strategies: things you can do to prevent aggression or how to set up your dog's environment so as to reduce or eliminate the expression of aggression. I think that this aspect of the blook -- this discussion of managing the environment to reduce and prevent aggression -- is unique to this book, and is valuable.
Invaluable for retraining aggressive dogs, it is also my "go to" book when planning my lessons for teaching basic home obedience class and puppy class. As I said, it is a book for everyone with a dog, not just those with aggressive dogs, and it is also tremendously helpful for dog training instructors as well as dog owners. Anyone who trains others to train dogs needs this book, as he or she will invariably run up against dog-aggression problems. A must-read.