This book is fantastic, other reviewers haven't understood the intentions of this book. It isn't intended for the general dog owner, i am doing a behaviourist course, and need to know not only the effects of a behaviour,but how and why that behaviour occurs, and be able to refer to how the dogs brain (and mind) works in relation to this behaviour. If you just want a book that will tell you how to re-train a problem dog this isn't the book for you. BUT if you are TRULY interested in canine behaviour, and why they behave as they do, and are willing to discover the indepth truth (which does touch on the original scientists who discovered most of what we now know about dogs- of course using what we now class as neanderthall techniques). This book is for a committed learner, it is not a coffee table read,or a quick fix book, but a VERY interesting and informative read. A MUST if you are seriously studying canine behaviour!!