Synopsis
History
First publication: Ace Double #M-133, with The Caves of Mars by Emil Petaja, Ace Books, 1965
Review
Videos
We have the story in these editions:
The Caves of Mars / Space Mercenaries, paperback, Ace Books, 1965-00-00
All of the stories in the Empress Irene series:
1 Empress of Outer Space
2 Space Mercenaries
3 Nebula Alert
