Bought it for Gene Wolfe's Fifth Head of Cerberus, which I was surprised (somewhat) to learn was beaten out by a hair by Arthur C. Clarke's A Meeting With Medusa for the 1972 Nebula award for best novella. Short stories are not my favourite, generally, though I appreciate the form. Otherwise an excellent collection of big names and a notice of a changing of the guard, in some ways - Wolfe's story is the better, and of the new guard of writers, whereas Clarke's represents the best of the old guard, both stylistically and subject-wise (space exploration, android dreams-not). What is the standout of this collection is Asimov's very insightful introductory essay on science-fiction and conventional literature, which surprised me: he articulated my own belief that science fiction is as an idea what matters but conveys an idea of what the future now could be. In the 21st century, we have entered that future now, and it shows how the science fiction of this time is no longer Asimov's hard science fiction in the sense of fiction based on actual scientific discovery, fact, or application. And it is not even science fiction in the sense of a futuristic environment powered by scientific advancements; it is just fiction, with our powerful toy phones ruining the speculative vision of the future. Or so it seems to me. Asimov's introductory remarks to each story, with reference to the others included in the collection, are insightful and interesting, in and of themselves. Reminding me once again of Asimov's great contribution as writer and editor to the genre, and a great fan of it, at heart.