Notes: Dated 1st printing of this 2010 edition, and by numberline. Title page:

• Gollancz colophon.

Copyright page:

• "Copyright © Samuel R. Delany 1967"
• "Introduction Copyright © Adam Roberts 2009"
• "First published in Great Britain in 1999 by [over] Millennium [over] An imprint of Orion Books Ltd"
• "This edition published in Great Britain in 2010 by [over] Gollancz [over] An imprint of the Orion Publishing Group [over] Orion House, 5 Upper St Martin's Lane, [over] London WC2H 9EA"
• "An Hachette UK company"
• Numberline: "1 3 5 7 9 10 8 6 4 2"
• "ISBN 978 0 575 09420 8"
• "Printed in Great Britain by Clays Ltd, St Ives plc"

Back cover:

• "Based on illustration by Chris Moore/ Artist Partners" (no visible signature on the artwork)
• "UK £7.99" (no additional pricing)

Spine:

• SF Masterworks, Babel-17 in black; Samuel R. Delany in green, all on graduated yellow-to-white ground.

Full date from Amazon UK and sfgateway.com as at 2023-03-29. Introduction is signed, page xi, "Adam Roberts". Novel starts on unnumbered page 1. Novel is signed, page 192, "— New York. [over] Dec '64—Sept '65". Semi-gloss cover.