One of science fiction's undisputed grandmasters, Frederik Pohl built an astonishing career that spanned more than seven decades. Along the way he won millions of readers and seemingly as many awards while producing novels, short stories, and essays that left a profound mark on the genre. In this first-of-its-kind study, Michael R. Page traces Pohl's journey as an author but also uncovers his role as a transformative figure who shaped the genre as a literary agent, book editor, and in Gardner Dozois' words, "quite probably the best SF magazine editor who ever lived."