I actually hadn't seen this movie before, and decided to read the book. They did a decent job at following the book. You are correct that things are left out, some I could see because of the time constraint. The book follows Norman and also has a lot of inner monologue with him, just something you can't get across in a movie well. There was only one change that I didn't really like. I'll keep this spoiler free as much as I can, when Norman runs to the sphere to see if Harry is ok. While we never see it 100%, the movie super heavily implies that Norman enters the sphere. I feel this really changes the feeling about what's happening later on.
Shout by DeletedBlockedParent2013-08-10T21:48:01Z
Not bad but I'm guessing this is yet another one of those films where the book is ten times better than the movie. I got the impression that a lot was left out in order to keep the movie to a manageable running time.