| Publisher | Penguin Books |
| Imprint | Penguin Science Fiction |
| Cover Art by | Adrian Chesterman |
| Printed and Bound by | Richard Clay (The Chaucer Press) Ltd |
| Format | Paperback |
| Language | English |
| Location | London |
| This Edition Published | 1979 |
| Copyright | 1977 |
| Pages / Font | 254 pages / Linotype Times |
| ISBN | 0 14 00.4821 9 |
| Price | United Kingdom 95p, Australia $2.95 (recommended), Canada $2.50 |
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