Time in Advance
William Tenn
 The Earth is visited by large, enigmatic alien spheres, who take up residence in colonies on several prairies and deserts across the world. They make visits to cities, factories and other areas of human activity, seemingly to merely float and observe. All attempts at communication are unsuccessful and despite the best efforts of mankind, no one is able to decipher their intentions. Some, however, have come in to close encounter with the aliens, and emerged dramatically altered beings. These people, called humanity-prime, and dubbed 'primeys', are highly intelligent, can bend matter to their will, but are also, by human standards, quite, quite mad. Algernon Hebster is a highly successful businessman, owing mostly to his dealings with primeys, who supply him with the knowledge for advanced technologies which he puts to use in commerce. The problem is that primeys are so dangerous that dealing with them is highly illegal and every attempt is made to confine them to the reservations around their perceived alien masters.