Robot–Empire–Foundation Reading Order
Robots
- I, Robot / The Complete Robot
- The Bicentennial Man (novella) (1976)
Spacers / Robots
- Mother Earth (short story) (1949)
- The Caves of Steel (1954)
- The Naked Sun (1957)
- Mirror Image (short story) (1972)
- The Robots of Dawn (1983)
- Robots and Empire (1985)
Between Robots and Empire
- Caliban, Inferno, Utopia by Roger MacBride Allen (1992/1993/1996)
Empire (optional)
- The Stars, Like Dust (1951)
- The Currents of Space (1952)
- Pebble in the Sky (1950)
- Blind Alley (short story) (1958)
Foundation
- Foundation (1951)
- Foundation and Empire (1952)
- Second Foundation (1953)
- Foundation’s Edge (1982)
- Foundation and Earth (1986)
- Prelude to Foundation (1988)
- Forward the Foundation (1993)
Outside the timeline
- The End of Eternity (1955), retroactively linked to the universe in Foundation and Earth.
- Nemesis (1989), loosely connected to the early pre-Spacer era.