I have two dogs, both Border Collies.The second of them was a stray I took in about two years ago which had been abandoned near to where I live. Apart from being half-starved, he came with more emotional baggage than I ever thought possible - frightened of people, other dogs, cars,the vacuum cleaner and even of having his photograph taken to name but a few and when he's frightened, he bites - or did, he's now much more confident. Because of him, I have read literally dozens of books about the inner workings of dogs. This particular book was recommended to me by the Canine Behavourist who advises me and is by far the best I have read. The amount of information is considerable, much of which I have not read elsewhere and yet it is not difficult reading. I would recommend it to anybody who has a dog whether it has problems like mine or not.