"...incorporates "Lecture XLII - About itself" and "Afterword" which first appeared in Golem XIV" - T.p.verso.
Originally published: San Diego: Harcourt Brace, 1984; London: Secker & Warburg, 1985.
Imaginary magnitude by Stanisław Lem. ISBN 0749305282. Published by Mandarin in 1991. Publication and catalogue information, links to buy online and reader comments.