Isaac was the first person to sucessfully blend mystery and science fiction. This book contains most of the mysteries of his best Sci-Fi Detective, Edward Urth. Dr. Urth is a exoterrologist who solves mysteries at his armschair that happened thousands of miles away. Also includes a funny one "I'm In Marsport Without Hilda", the perfect murder with a time machine "Obituary", and more! Dr. Asimov's mysteries are short, well-written, intelligent and as satisfying as a chocolate covered granola bar. A must read for all mystery fans. If you loved the Black Widowers mysteries you'll love this.