I guess the reason I like reading Agatha Christie's murder mysteries so much is because I love me my unforgettable, mind-blowing endings. In every book I read. To me, if it's a story that doesn't end well (or rather, does not have a very good falling action), it's just an okay story. You have to end a story well.
And Christie does it very well.
Even though the beginning was slightly dragging (which I had to understand, because the author needed to establish the mystery and the red herrings first), the ending made up for it a hundred percent. No wonder Orient Express
is up there among Christie's best. Okay, who would have thought that everyone was in on it. *Mind-fucked*
I mean, in murder mysteries, you expect that there will only be one murderer. So, yeah, I greatly appreciated Christie's different take on the murder mystery, by making all the suspects guilty of the crime.
Update: I found the 1974 movie version for this, and I'm surprised it's so star-studded. Sean Connery, Ingrid Bergman, Anthony Perkins, and I don't know any of the actors, but they do look glamorous. Already I'm thinking up my own version of a 2013 adaptation for this.