Twenty-five of the finest science fiction short stories from one of the genre's greatest writers, Isaac Asimov. Isaac Asimov was the Grand Master of the Science Fiction Writers of America, the founder of robot ethics, and one of the world's most prolific authors of fiction and non-fiction. Asimov's short fiction has been enjoyed by millions for more than half a century. Many of the stories in this collection are classics of the genre, including 'Living Space', which looks at the consequences of the existence of parallel universes and what would happen if life on Earth never developed. Always entertaining and thought provoking, these stories display Asimov's mastery of the short story form. He remains supreme as the thinking person's science fiction writer.