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

Meet again Gilbert Gosseyn, the man with the extra brain who staved off disaster for the Solar System, as he finds himself launched on his greatest challenge — a showdown with the originators of cosmic civilization. Null-A 3 is destined to become an instant classic — a mind boggling galaxy-spanning adventure!