by Isaac Asimov
In addition to its stand-alone volume, this title was published in the follow books. It can be rated independently of any volumes containing it.
The Foundation Trilogy (1963)
Omnibus, 510 pages
Part of the Foundation series.
The Foundation Trilogy: Foundation, Foundation and Empire, Second Foundation; The Stars, … (1981)
Omnibus, 864 pages
Foundation Series (1986)
Omnibus
Foundation, Foundation and Empire, Second Foundation (Everyman's Library (Cloth)) (2010)
Omnibus, 648 pages