Foundation's Edge

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 suc... » 

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. «