Notes: Stated 2nd printing of a 2011 edition with this ISBN, by number line. Title page:

• "Sirius [over] A Fantasy of [over] Love and Discord [over] Olaf Stapledon" Gollancz colophon.

Copyright page:

• "Text copyright © Olaf Stapledon 1944"
• "Introduction copyright © Graham Sleight 2010"
• "This edition first published in Great Britain in 2011 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"
• "Printed in Great Britain by [over] Clays Ltd, Elcograf S.p.A" (Thus 2018 or later.)
• Number line: "3 5 7 9 10 8 6 4 2"
• No ISBN.

Back cover:

• "Illustration by Cliff Nielsen"
• "UK £7.99" (no additional pricing)
• "ISBN 978-1-407-24854-7". "No EAN".

Spine:

• "SF Masterworks", "Sirius" in black; "Olaf Stapledon" in dark brown, all on graduated yellow-to-white ground.

Introduction is signed "Graham Sleight" on page viii. Novel starts on numbered page 1, finishes on the last numbered page, 194. Gloss cover. Note: This cover has the author's name in yellow. Do not confuse with an alternative image with the author's name in green.