In this classic novel by the Science Fiction Grand Master, a writer searching for explanations uncovers the existence of mutants and multiple Earths: "First-rate Simak" (The New York Times). Author Jay Vickers would like nothing more than to be left alone so he can finish his next book. But "there's something strange going on," as his peculiar neighbor, Horton Flanders, says. For instance, the market is filling with new inventions...