Sci-Fi pulp novels Sinister Void and Captives of Space by Joe Bennett (José Luis Benet Sanchís) with cover art by José Luis (José Luis Macías) circa 1958. Via Google Translate:
“Do you think it’s possible to remedy the chaotic situation in which the ‘vagaspaces’ of the uranium spaceship live?
Alone in the infinite Universe, surrounded by dangers and condemned to ‘brain death’, the anguish acquires a high degree of tension on each page. Science and futuristic fantasy. Situations that you will not be able to endure without being upset because SINISTER VOID is the title that all true lovers of fantasy literature were anxiously awaiting.”










