I found the book at Borders-it's a fast read only @50 pages. Though i haven't seen the movie, the reviews I have read make it sound like the movie does follows the book very well. The book had the same sparseness as the movie seems to. I thought the reader was lead to believe that Jack was murdered, but it was never clearly stated.
i am going to try to see it by myself if i get a chance. but the closest place that is showing it is an hour away. i live in kind of a small place with nothing good around. i have to drive at least an hour to do any decent shopping. but i really want to see this movie. so i'll give it a shot