Nightfall /
Isaac Asimov and Robert Silverberg.
- 1st ed.
- New York : Doubleday, c1990.
- viii, 339 p ; 25 cm.
"A Foundation book.".
Kirkus Review. School Library Journal. Wilson's Fiction.
Kalgash is a world on the edge of chaos, torn between religious fanaticism and scientific rationalism. Their civilization is threatened by Nightfall, the first sunset in over two thousand years.