The Faded Sun trilogy is a series of science fiction novels set in the Alliance-Union universe of C. J. Cherryh. The series comprises the three novels Kesrith (1978), Shon'jir (also 1978), and Kutath (1979) and were published by DAW Books. They were re-published in as an omnibus edition in the UK in 1987 and in the U.S. in 2000.
The series consists of some of the earliest of Cherryh's novels, notable for its world-building and extraterrestrial races. Both the mri and the regul fulfill John W. Campbell's dictum of "show me a creature that thinks as well as a man, or better, but not like a man.
The Faded Sun trilogy can be considered a Bildungsroman, since one of the major themes is the coming of age of Niun, the mri protagonist. At the same time, it is a story of acculturation, as the human protagonist, Sten Duncan, lives among the mri to the point of becoming one of them.
The Faded Sun trilogy is the principal account of the Mri Wars era of Cherryh's Alliance-Union universe. At the beginning of the first volume, the regul have just concluded a forty-year war with humanity. As part of the peace, they are ceding the desert world of Kesrith to humanity. However, they have neglected to inform its inhabitants, the mri, who have served them as mercenaries for over two thousand years.