| Author | Jack London |
| Publisher | Ediciones Generales Anaya |
| Copyright Holder | Ediciones Generales Anaya, S. A. |
| Publisher Series | Tus Libros, Ciencia Ficción (2) |
| Translated by | Francisco Cabezas Coca |
| Selected by | Francisco Cabezas Coca |
| Appendix | Francisco Cabezas Coca |
| Illustrator | Juan Paccini |
| Designed by | Rolando & Memelsdorff Diseñadores |
| Author photo/portrait | Justo Barboza |
| Cover Art by | Juan Paccini |
| Printed by | Litografía Josmar, S. A. |
| Format | Hardback |
| Language | Spanish |
| Copyright | 1984 |
| This Edition Published | 1984 |
| This Impression | 1984-09 |
| Pages / Font | 224 pages |
| ISBN | 84-7525-172-2 |
| DL (Spanish) | M. 27.549/1984 |
| Series Number | 43 |
| Notes | 9 Short stories:
Semper Idem
Los Favoritos de Midas
Goliah
Un fragmento curioso
La huelga general (El sueño de Debs)
Una invasión sin precedentes
La fuerza de los fuertes
Estado de guerra
El Rojo. |
