Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Where can I find the original short story?

I agree that the original "Nightfall" short story is one of the very best from the Golden Age of Science Fiction in the 1940s, and I see no need for it to have been expanded into book length.But where can I find the original still in print?A note on one of the earlier reviews of this book: I'm sure the 16th-century astronomer and mathematician Johannes Kepler was meant, not the 20th-century novelist Arthur Koestler.