If you try to squeeze more than 60 topics accompanied by hundreds of photos and charts into a 160-page book, something has to give--in this case, thoroughness. The title could also lead one to believe that the book is about the psychology of dogs, particularly because just such a book, with the same title, appeared in 1972. In any case, it's not. Rather, it's a collection of doggy data, not unlike a massive research paper, with brief sections on: canine ancestry, communication between humans and dogs, the history of the breeds, training dogs, raising and socializing puppies, etc. A more extensive section reports on dogs bred for special purposes, such as hunters (Spaniels, Setters), herders (German Shepherds, Collies), and guard dogs. But for the most part the text is scanty--a single page, for instance, is devoted to choosing a dog (and provides such obvious advice as not matching a bold dog with a quiet person). Oversimplified for just about anyone.