Foundation and Empire   (book)

Foundation and Empire

As time passes during the fall of the great Galactic Empire, tales of technology past become miracles performed by magicians. The Foundation is ruled by hereditary kings with near-absolute power. But then the balance is upset by a mutant calling himself the Mule, with mind control powers! He takes lots of stuff over, and starts looking for the Second Foundation (from the first book). This book is about that search. There are lots of neat gadgets and the plot hides universal political and social themes just waiting to be discovered.