| Author | Frederik Pohl |
| Copyright Holder | Frederik Pohl |
| Publisher Series | Gollancz SF |
| Publisher | Gollancz, Victor Gollancz Ltd |
| First Published by | Ballantine Books |
| Published in/by Arrangement with | Random House, Inc. |
| Printed by | St Edmundsbury Press Ltd |
| Format | Hardback |
| Language | English |
| Location | UK |
| Copyright | 1985 |
| This Edition Published | 1986 |
| ISBN | 0-575-03848-9 |
| Barcode | 9 780575 038486 |