Citadel of Lost Ships
Author: first_name: Leigh Douglass
last_name: Brackett
Language: English

"It was a Gypsy world, built of space flotsam, peopled with the few free races of the Solar System. Roy Campbell, outcast prey of the
Coalition, entered its depths to seek haven for the Kraylens of Venus—only to find that it had become a slave trap from which there was no escape." - Summary by the publisher