There are many ways to adapt a book into a movie and it’s rare to see a film that doesn’t deviate from its source material in one way or another.
Characters get cut or replaced. Events in the plot get moved around or reimagined. Stories get streamlined. Subplots get jettisoned. Titles get changed. Sometimes Muppets get added. It's a very broad spectrum.
Fundamentally though, the central thrust remains more or less the same. After all, a screen adaptation is usually a way to tell the same story or make the same point in a different way. And the whole point of adapting - at least in Hollywood's eyes - is capturing an already engaged audience to sell more tickets. If you start changing things, all you do is annoy them.
But that's not always the case and it's not so for these ten films. Sometimes, filmmakers feel that the best way to stay true to the spirit of the book they’re adapting is to completely change everything. It's a bold choice, let's see how it plays out...