Other
- Empire. New York: World Editions, 1951; paperback. Written (and bylined) by Clifford Simak from Campbell's plot. The book was apparently written by Campbell as a teenager; he was unable to find a publisher for it and turned it over to Simak to rewrite it for Astounding. Simak said of the book that "Empire was essentially a rewrite of John's plot. I may have taken a few of the ideas and action, but I didn't use any of his words. And I certainly tried to humanize his characters". Simak's version was, ironically, rejected by Campbell, and finally appeared in the Galaxy Novel series from World Editions. Currey indicates here that the quote from Simak is "via Muriel Becker", without giving more details. There is a Simak bibliography by Muriel R. Becker, which may be the source: Clifford D. Simak: A Primary and Secondary Bibliography; Boston, G.K. Hall & Co.; 1980.
Read more about this topic: John W. Campbell Bibliography