Notes: Undated 2nd printing of the 1991 edition, by numberline. Title page:

• "Pan Books [over] London, Sydney and Auckland"

Copyright page:

• "First published 1990 by Victor Gollancz Ltd"
• "This edition published 1991 by Pan Books Ltd, [over] Cavaye Place, London SW10 9PG"
• Numberline: "9 8 7 6 5 4 3 2"
• "© Nightfall Inc and Agberg Ltd 1990"
• "Based in part on material © Isaac Asimov 1941, 1969"
• "ISBN 0 330 31468 8"
• "Printed and bound in Great Britain by [over] The Bath Press Ltd, Avon"

Back cover:

• "Cover illustration by Chris Moore"
• "UK £7.99 Not for sale in Canada NZ$29.95 rrp incl GST"

The essay is signed on page 7: "I.A. [over] R.S." Novel title on page 9, novel starts on the first numbered page, 11. Gloss cover. 15.1 x 23.1 cms. For cover identification purposes, note that there are two slightly different versions to accommodate the pb/tp size difference; the text is moved relative, most noticeably, to the star background. Compare this image with the 1st printing pb.