John Grogan's book, "Marley & Me" was one of the most enjoyable books I have ever read! And yes the movie as well.
It starts with a newlywed couple, John and Jenny. They move from Michigan to Florida and get jobs as newspaper reporters. Jenny wants to have a baby. However, John is not ready for fatherhood yet. So, they adopt Marley, a Lab puppy, that they fall in love with.