Darkover

The Darkover series is a collection of science fiction-fantasy novels and short stories written by Marion Zimmer Bradley. The series is set on the planet of Darkover, where a group of humans have been stranded and have developed their own unique culture and society. The books focus on the conflicts between the human settlers and the native population of Darkover, as well as the struggles of the various factions on the planet. The series is known for its complex world-building and exploration of themes such as gender, sexuality, and mental illness.