I read the book, and recently watched the movie. I have to say. I loved the book. I liked the movie too, but as it is a movie, things felt too rushed, but it was overall a good movie. The thing that made most impression on me was the movie soundtrack. It was so amazing in so many ways. Listening to that, I felt like I could get a hold of a Soul's essence. Among them, the soul track would of course be my favorite.
This track is called "Soul inside" (track 02) Every time I hear it, I get goosebumps. "Soul outside" (track 22) is essentially the same track with a different ring to it, there is more hope into it, I think. I feel so at peace every time I listen to them.
This soundtrack is more than enough to make me watch the movie again.