McSweeney's recommends it and they are so, so, so right to do so:

You Are a Dog by Terry Bain
We've been remiss in not recommending this book earlier, because it is awesome and made us laugh many times, and even cry once or twice. (OK, several times.) We recommend reading it in the presence of your dog or dogs, because you will read a passage and then look at your dog or dogs and say to them, "So that's what you've been thinking," and, if possible, you will love them even more.