Forty Thousand in Gehenna Hardcover – January 1, 1983 by C. J. Cherryh 
 
"Set in the same future as the Hugo-winning Downbelow Station, but fully self-contained, this is a story on the classic theme of human understanding of the alien. . . . Once again, Cherryh proves herself a consistently thoughtful and entertaining writer."--Publishers Weekly. Reissue.
 
5.8