Secret Agent of Terra

Secret Agent of Terra is a 1962 science fiction novel by British writer John Brunner. It is the first book of the Zarathustra Refugee Planets series; the other books are Castaways' World (1963) and The Repairmen of Cyclops (1965). Secret Agent of Terra was first published as Ace Double F-133, with The Rim of Space by A. Bertram Chandler.

Brunner later reworked the story for his 1969 novel The Avengers of Carrig.

Plot summary
Planet 14 was just a speck on a spacial stereo map, just a world inhabited by a group of barbaric refugees. But to Belfeor, it was instant cash. All he needed was an iron hand and a means to dig out its radioactive resources for export to his own world. To Maddalena it was a final exam: this would be her last chance to prove herself worthy of Corps Galactica membership. To Saikmar, it was a nation and a people stolen from him by cruel treachery. To Gus Langenschmidt, it was part of a job he had, watching the skies and helping men who were being enslaved. But how do you help people who don't know you exist and who must not be told?