If you are researching potential breeds for your next dog, this book might be a good addition to your research. It was published in 1999, so it's been around quite a while, but still has some great info. It gives you some ideas to consider when choosing and then gives you some good info on particular breeds you might be interested in. It seems to give pretty realistic feedback about the various breeds.
Paws To Consider by Brian Kilcommons and Sarah Wilson