The third volume in the "Foundation" series, a world famous trilogy which is one of the great classics of science fiction. 

          The Foundation lies in ruins – destroyed by the Mule. But there’s a rumour that there is a Second Foundation hidden somewhere at the end of the Galaxy, whose aim is to preserve the knowledge of mankind through dark period. The Mule didn’t find but now he knows where it lies. The fate of the Foundation rests on fourteen years old Arcadia Darell.