It usually seems (to me any ways) that many of the fine details are left out of movies that are based on books. My personal thought is what came first? The book or the movie? Usually it is the book. Like books from series, I have to read them in order and it is the same with books made into movies...the books came first. My step-son insisted he didn't need to read Harry Potter. He would just see the movie and know all there was to know about the book. So when the movie came out, he and I went to go see it. He didn't believe me when I told him there was a lot of stuff left out of the movie that was in the book. I then dragged the book out and started to read off things left out of the movie. He said let me see that book. Next thing I know he was reading the book!! I finally got him to read and he has loved to read ever since.