| Author | A. E. van Vogt |
| Translated by | A. Maldonado Domingues |
| Cover Art by | Cândido Costa Pinto |
| Publisher | Livros Do Brasil |
| Publisher Series | Colecção Argonauta |
| Format | Paperback |
| Language | Portuguese |
| Location | Portugal |
| This Edition Published | 1955 |
| Series Number | 22 |