I've only read about half the book. I really love the movie, and the book seems to have everything that's in the movie and more. I didn't like the "more". The movie is full of restraint, subtlety, drama. Storms under a frozen surface. I felt that the book was diluted, comparatively. For example I prefer the story without a romantic/sexual plot. I think the cuts that were made for the movie just strengthened the story and the atmosphere. I didn't find anything in the book that I felt was missing from the movie.