Frederik Pohl was an influential writer and editor. As an editor he won three Hugo awards for best professional magazine. As a writer he won four Hugo Awards and three Nebulas. Pohl was awarded the title of Grand Master by the Science fiction Writers of America and is a member of the Science Fiction Hall of fame. Collected here are a novel and five stories that helped Pohl carve his name onto the science fiction field. His stories are imaginative and powerful.