No one can quite agree on what makes a book unfilmable. Some books are thought to be too boring, plotless, or introspective; others are too interesting, exciting, imaginative, or complicated. The one thing people agree on, though, is that there are some books that should never, ever, be adapted into TV shows or movies. What makes the idea of unfilmable books fun, however, is that once in a while a project comes along that proves everyone wrong and adapts a difficult book into something new and good in its own right, with artistic value independent from the work it was based on.