Discussion thread: books into films

Movies and books are two different ways of telling stories; when a story is translated from a book into a film, something, of necessity, will change. What are some examples of successful book-to-film transitions? What are some unsuccessful examples? What, do you think, is the fundamental difference, the reason why the change occurs between the two media? I’ll be watching this space throughout the day and following live from 12-12:30 CT. Let’s have a fun chat!