I started reading the book, but after 50 pages I decided to simply watch the film. I'm glad I did. I suppose I got a sense of the main character from the book initially, and I thought the actors did an excellent job of portraying such a troubled soul. I really enjoyed the film.
I have to say that it was a little disconcerting that the main character, as an adult, looked a lot like the pianist Vickinger Ohalfson from Iceland.