Presents a new edition of the classic, influential science fiction novel, first published in 1949, about non-Aristotelian logic and the coming race of superhumans. It tells the story of Gilbert Gosseyn, a man living in an apparent utopia in which those with superior understanding and mental control rule the rest of humanity. But when Gosseyn wants to be tested by the giant Machine that determines such superiority, he finds that his world is not as it appears