But other than our own cognitive laziness, there's nothing that says stories have to be so formulaic, that tales can't be spun around innovative, inventive structures. Not in the movies, of course -- those are doomed. But in a word-movie, the so called "book"? Holy s**t, yes. With no obligation to make back a $200 million budget or pull in the increasingly slope-browed 16-to-24 demographic, writers have pulled all sorts of inventive stunts when writing novels. Here are five of the most mind-bending.