Over the span of forty two years
IsaacAsimov created an epic of Galactic proportions: he showed us the rise and fall of the largest human Empire ever. It consists of seven volumes (about 800,000 words), which although they can be read separately, are closely linked to one another.
/PreludeToFoundation (1988)
/ForwardTheFoundation? (1991)
/Foundation? (1951)
/FoundationAndEmpire? (1952)
/SecondFoundation? (1953)
/FoundationsEdge (1982)
/FoundationAndEarth (1983)
see FoundationTrilogy