Titles by Isaac Asimov marked with tag: hard sf
- 1993 - Forward the Foundation
- 1988 - Prelude to Foundation
- 1986 - Foundation and Earth
- 1982 - Foundation's Edge
- 1975 - The Life and Times of Multivac
- 1970 - Waterclap
- 1956 - The Last Question
- 1953 - Second Foundation
- 1952 - Foundation and Empire
- 1952 - The Martian Way
- 1951 - Foundation