I found the book more disturbing than the movie, although I'm not sure if the reason is last time I saw the movie was high school. What is interesting to me, is the difference in the endings. In the movie we see the narrator and Marla going out in a blaze of glory as the world topples around them. The novel ends with the narrator in an institution for the criminally insane, with Project Mayhem members still around him. It's the fact they still go along, they still believe, that disturbs me. It's a reflection of the idols we build, that we believe to be infallible no matter what. And that ending, is what makes the book better than the movie in my opinion.