In some respects Foundation's Edge is not simply a continuation of the earlier stories, but is a redirection. A certain amount of past history has had to be rewritten, notably the career of Asimov's famous Napoleonic character, the Mule. But more important is the shift of Asimov's own position toward the ideas in the stories. The previous stories, it is now clear in retrospect, emerged from the milieu of Hitler's Germany and World War II. The Foundations were a parable on Judaism: the sacred text and its rabbinical exegetes; xenophobia; persecution; existence under cover; chiliasm and the double ghetto of the Foundations. These elements have now been minimized. The Seldon Plan is now revealed to be a fraud. The Second Foundationers, despite their paranormal abilities, are no longer pious saints but humans weighted somewhat on the down side. And the female Mayor of Terminus (chief magistrate of the...