The history is great, if you like that kind of thing (I do). Ditto for the biographical sketches. The personality test was very interesting, but I took it several times over the course of a year or so and got rather different results, although I was trying to be as honest as possible each time. Fun to read, but I would use this book only as a first step -- and I'm not sure that I would ever reject a breed solely on the basis of its information. The groups Coren separates his breeds into make a lot of sense intuitively, and the statistics seem to make sense too.