I saw the movie and then found out that The Notebook was actually based off of a novel written by Nicholas Sparks.
However, I was disappointed. It was still an excellent book, but what I liked most about the movie was that it revolved around their summer romance when they were younger. But in the book, it doesn't have anything like that really. It mentions a few things, but overall it's more about Noah and Allie getting back together.
I liked the movie better, just because half the movie's about them when they were younger. However, The Notebook is still on my bookshelf as one of the best reads I've ever picked up. I enjoyed reading it.