By Douglas Orgill and John Gribbin. 1979. This edition, 1981.
By Tanith Lee. 1985. Cover art by Michael Whelan.
By Janet Morris. 1985. This edition, 1986. Cover art by David Mattingly. Anthology consisting of Janet Morris, Michael Armstrong, Gregory Benford, Stephen Leigh, Diana L. Paxson, Esther M. Friesner, Ian Watson, Craig Shaw Gardner, C. J. Cherryh, David Langford, and David Drake.
By R. M. Meluch. 1990.
By Andre Norton. 1972. This edition, 1980.
By Paul Cook. 1985. Cover art by Jim Burns.
By M.K. Wren. 1990. This edition, 1991.
By James Kahn. 1982. Cover art by Laurence Schwinger. Sequel to World Enough, and Time by the same author.