I enjoyed it until the end at which point I threw the book aside in disgust.

It wasn't that I'm not into shocking or sad endings, cause that's actually the stuff I'm totally into. But in this case, it just seemed so fake. So unnecessary. Like the author wrote 3/4s of the book and then just sort of forgot about the rest until she had to throw something together for her publishers. It seemed twisty just for the sake of being non-conventional. I'm glad they changed the ending for the film version.