| Author | Robert A. Heinlein |
| Publisher | The New American Library, Inc. |
| Imprint | Signet Books |
| Copyright Holder | Robert A. Heinlein, World Editions, Inc |
| Reprinted with/by arrangement with | Doubleday & Company, Inc. |
| Series | Signet Science Fiction |
| Format | Paperback |
| Language | English |
| Location | United States |
| Copyright | 1951 |
| Pages / Font | 175 pages |
| Catalog Number | T3752 |
| Other | 451-T3752-075 |
| Impression/Printing No. | 11th |
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