| Author | Gordon R. Dickson |
| Copyright Holder | Gordon R. Dickson, Street And Smith Publications, Inc. |
| Series | Childe Cycle |
| Publisher | Sphere Books, Sphere Books Limited |
| First Published by | Street And Smith Publications, Inc. |
| Printed by | Hazell, Watson & Viney Ltd |
| Format | Paperback |
| Language | English |
| Location | UK |
| Copyright | 1959 |
| Copyright | 1960 |
| This Edition Published | 1975 |
| Pages / Font | 175 pages / Linotype Baskerville |
| ISBN | 0 7221 2951 3 |
| Price | 50p United Kingdom |
| Price | $1.50 Australia |
| Price | $1.50 New Zealand |
| Price | $1.95 Canada |
Added by Supernaut1970