Psychohistorical Crisis

Psychohistorical Crisis is a science fiction novel by American-Canadian writer Donald Kingsbury, published by Tor Books in 2001. An expansion of his 1995 novella "Historical Crisis", it is a re-imagining of the world of Isaac Asimov's Foundation series, set after the establishment of the Second Empire. The book is neither officially authorized by Asimov's estate, nor is it intended to be recognized as part of his continuity.