El Invencible
| Book | Niezwyciężony* |
| Format | Soft cover |
| Language | Spanish |
| This Edition Published | 1978 |
| Original Title | Niezwyciężony |
| Original Language | Polish |
| Author | Stanisław Lem |
| Publisher | Minotauro |
| Translated by | M. Horne |
| Cover Artist | Domingo Ferreira |
| Printed by | Talleres Gráficos Carollo S.C.A. |
| Format | Soft cover |
| Language | Spanish |
| Location | Buenos Aires, Argentina |
| This Edition Published | 1978 |
| Pages / Font | 198 pages |
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