Foundation 4 - Foundation's Edge
Title: Foundation 4 - Foundation's Edge
Author: Asimov, Isaac
Summary
It is 498 years since the two Foundations came into existence - half-way through the Interregnum planned by Hari Seldon. The Second Foundation has once more successfully concealed its existence so that the laws of psychohistory can operate to usher in a new Empire ruled by the mental sciences.
