Publisher: Sphere, UK

Binding: Paperback

Date of issue: 1980, (may be Jan 1981)

Cover: Peter A Jones

ISBN: 0-7221-5541-7

Page count: 288

Additional material: "The Arcturan Shadow" by E H Visiak

Edition notes: The copyright page incorrectly states "First published in Great Britain by Victor Gollancz in 1920" (i.e., wrong publisher).