| Author | Isaac Asimov |
| Copyright Holder | Isaac Asimov |
| Cover Art by | Cesare Reggiani |
| Series | Wendell Urth, Multivac |
| Publisher | Grafton, Grafton Books, Collins Publishing Group |
| First Published by | Rapp & Whiting Ltd |
| Printed and Bound by | Collins, Glasgow |
| Format | Paperback |
| Language | English |
| Location | UK |
| Copyright | 1968 |
| This Edition Published | 1969 |
| Reprinted | 1970 |
| Reprinted | 1971 |
| Reprinted | 1972 |
| Reprinted | 1973 |
| Reprinted | 1974 |
| Reprinted | 1979 |
| Reprinted | 1980 |
| Reprinted | 1981 |
| Reprinted | 1984 |
| Reprinted | 1986 |
| Pages / Font | 256 pages / Linotype Pilgrim |
| ISBN | 0-586-02929-X |
| Barcode | 9 78056 029299 |
| UPC 5 | 0 0 2 5 0 |
| Price | 32.50 U.K. |
| Price | $9.95 New Zealand |
| Price | $7.95 Australia |
Added by Supernaut1970