| Author | Arthur C. Clarke |
| Publisher | Sphere Books |
| First Published by | Sidgwick & Jackson Limited |
| Format | Paperback |
| Language | English |
| Location | UK |
| Copyright | 1951 |
| First Printing in Country | 1951 |
| This Edition Published | 1973 |
| Pages / Font | 206 pages |
| ISBN | 0-7221-2420-1 |
| Price | 35p |
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