 | New York: Timescape [Simon and Schuster] [ISBN 0-671-44973-7] [hc] ($17.50), April 1982; 397 pp. [cover: Vincent DiFate] |
 | London: Gollancz [ISBN 0-575-03121-2] [hc] (£6.95), Jul 1982; 397 pp. [no cover art] |
 | New York: Timescape [Simon and Schuster] [book club edition published by Doubleday] [no ISBN] [hc] ($6.50), October 1982; 339 pp. [cover: Vincent DiFate] |
 | New York: Timescape [Pocket] [ISBN 0-671-83576-9] [pb] ($3.50), April 1983; 397 pp. [cover: Vincent DiFate] |
New York: Timescape [Pocket] [ISBN 0-671-49615-8] [pb] ($3.95), [undated]; 397 pp. [cover: Vincent DiFate] |
 | London: Sphere [ISBN 0-7221-1945-3] [pb] (£2.25), August 1983; 397 pp. [cover: unidentified] |
 | [as Sólo un enemigo: el tiempo] [Spanish translation by César Terrón] Barcelona: Acervo (#55) [ISBN 84-7002-364-0] [hc], (1822 pta), January 1984; 480 pp. [cover: Norma-Bernal] |
 | [as Nur die Zeit zum Feind] [German translation by Biggy Winter] Munich: Heyne (#4095) [ISBN 3-453-31055-1] [pb] (DM 9.80), July 1984; 415 pp. [cover: Rafael Lopez-Espi/Norma] |
 | [as Il tempo è il solo nemico] [Italian translation by Roberta Rambelli] Milan: Editrice Nord (Narrativa d'Anticipazione #43) [no ISBN] [trade pb] (Lire 8000), June 1984; 346 pp. [cover: Giorgio Turino; introduction by Sandro Pergameno] |
 | New York: Bantam Spectra [ISBN 0-553-28187-9] [pb] ($4.95), September 1989; 338 pp. [cover: John Jinks] [Note: published as a "Spectra Special Edition"] |
 | New York: Book-of-the-Month Club [no ISBN] [hc] ($14.95), July 1990; 397 pp. [cover: Bill Osborn] |
 | Norwalk CT: The Easton Press [no ISBN] [leatherbound hardcover] (no published price), April 1991; 397 pp. [introduction: Pamela Sargent; frontispiece: Ellen Farley] |
 | [as Il tempo è il solo nemico] [Italian translation by Roberta Rambelli] Milan: Editrice Nord (Cosmo Argento #278) [ISBN 8-429-0958-0] [trade pb] (Lire 22000), April 1997; 346 pp. [cover: Peter Jones] |
 | London: Gollancz SF (#41) [ISBN 0-575-07096-X] [trade pb] (£10.99), April 2000; 397 pp. [no cover art] |
 | North Bend WA: ElectricStory.com [ISBN 1-930815-16-6] [RocketEdition e-book] ($7.99), [ISBN 1-930815-15-8] [Microsoft Reader e-book] ($7.99), [ISBN 1-930815-33-6] [Mobipocket e-book] ($7.99), July 2000; 310 pp. [cover: Jamie Bishop] |
 | [as Nie Masz Wroga Prócz Czasu] [Polish translation by Zbigniew A. Krolicki] Poznañ: Zysk i S-ka Wydawnictwo [ISBN 83-7150-606-6] [pb] (29 zlotych), 2000; 384 pp. [cover: Dariusz Jasiczak] |
 | [as Solo un enemigo: el tiempo] [Spanish translation by Ana I. Domínguez, Concepción Rodríguez, and María del Mar Rodríguez] Madrid: Edición de Factoría de ideas (Solaris ficción #64) [ISBN: 84-9800-148-X] [trade pb] (18,95 €), June 2005; 327 pp. [cover: Michael Whelan] |
 | London: Gollancz [SF Masterworks] [ISBN 978-0-575-09311-9] [trade pb] (£8.99), [ISBN 978-0-575-09312-6] [ebook] (£4.49), Aug 2013; ix+365 pp. [cover: Christopher Gibbs] |
 | [as Toki no ta ni teki nashi] [Japanese translation by Yutaka Oshima] Tokyo: Takeshobo [ISBN 978-4-8019-2669-1] [pb] (¥1400), June 2021; 623 pp. [cover: unknown] |