Editions of Robots and Empire

423 pages

English language

Published Jan. 24, 1985 by Grafton Books.

426 pages

Spanish language

Published Jan. 24, 1986 by Plaza & Janés Editores.

Paperback

English language

Published Jan. 24, 1991 by Plaza & Janes Editores, S.A..

Paperback, 512 pages

Spanish language

Mass Market Paperback

English language

Published Oct. 12, 1986 by Del Rey.

Paperback

Published Jan. 24, 1991 by Ballantine Books.

Published Jan. 24, 1994 by Circulo de Lectores.