I think I might have read a different book. There were parts that I liked, but I just didn't like the author as a person. He kept bringing up the fact that Marley was "just a dog". And, near the end, when they went on vacation and left him in a kennel even though he was old and sick, I almost stopped reading it.
Don't get me wrong, I thought some of it was cute. I just thought that a book like this would be targeted toward dog lovers, and dog lovers never have to downplay dog-love!