The Ultimate Vampire Resource and Directory

A collection of previously published science fiction short stories by Isaac Asimov. Asimov added a brief introduction to each story, explaining some aspect of the story's history and/or how it came to be written. The main criteria for inclusion were that they had to be quality stories, but not included before in any anthologies edited by Dr. Asimov himself.

In 1941, he published his 32nd story, "Nightfall", which has been described as one of "the most famous science-fiction stories of all time". In 1968 the Science Fiction Writers of America voted "Nightfall" the best science fiction short story ever written. In his short story collection Nightfall and Other Stories he wrote, "The writing of 'Nightfall' was a watershed in my professional career ... I was suddenly taken seriously and the world of science fiction became aware that I existed. As the years passed, in fact, it became evident that I had written a 'classic'".

"Nightfall" is an archetypal example of social science fiction, a term coined by Asimov to describe a new trend in the 1940s, led by authors including Asimov and Heinlein, away from gadgets and space opera and toward speculation about the human condition.