In this anthology honoring the fiftieth anniversary of Isaac Asimov's remarkable science fiction novel, today's leading authors—including Pul Anderson, Orson Scott Card, and Connie Willis—present stories set in the future that Asimov created in his own stories and novels. Contents Preface · Ray Bradbury Second Preface: The Nonmetallic Isaac or It’s a Wonderful Life · Ben Bova Strip-Runner · Pamela Sargent The Asenion Solution · Robert Silverberg Murder in the Urth Degree · Edward Wellen…