| Author | Robert A. Heinlein |
| Publisher | New English Library |
| Publisher Series | Four Square Science Fiction |
| Format | Paperback |
| Language | English |
| Location | UK |
| Copyright | 1959 |
| This Edition Published | 1968 |
| Pages / Font | 222 pages |
| Other | 450000842 |
| Notes | NEL |
| Author | Robert A. Heinlein |
| Publisher | New English Library |
| Publisher Series | Four Square Science Fiction |
| Format | Paperback |
| Language | English |
| Location | UK |
| Copyright | 1959 |
| This Edition Published | 1968 |
| Pages / Font | 222 pages |
| Other | 450000842 |
| Notes | NEL |