Foundation's Friends, Stories in Honor of Isaac Asimov is a 1989 book written in honor of science fiction author Isaac Asimov, in the form of an anthology of short stories set in Asimov's universes, particularly the Robot/Empire/Foundation universe. The anthology was edited by Martin H. Greenberg, and contributing authors include Ray Bradbury, Robert Silverberg, Frederik Pohl, Poul Anderson, Harry Turtledove, and Orson Scott Card. A "revised and expanded" edition was published in 1997, which added numerous memorials and appreciations written by those who knew him, many of them well-known authors and editors from the science fiction field.
Hardback: ISBN 0-312-93174-3
Paperback: ISBN 0-8125-0980-3
Revised and Expanded Edition (Paperback): ISBN 0-8125-6770-6
Read more or edit on Wikipedia