Excellent movie, although the ending is not the same as in the book I found both endings to be good. I enjoy both versions :D

The original idea behind the book was that protagonist and antagonist is all in how you look at it. It’s a majority vote. If majority is against it then it’s the antagonist. So in the character will plays he finds he is actually the bad guy.

None-the-less it kept me at the edge of my seat quite often.