The Left Hand of Darkness is a science fiction novel written by Ursula K. Le Guin. Set on the planet of Gethen, it explores the themes of gender and sexuality through the eyes of an alien envoy named Genly Ai. As Genly navigates the complex social and political landscape of Gethen, he uncovers the mysteries of its inhabitants and their unique biology. The Left Hand of Darkness is a groundbreaking work that challenges traditional notions of gender and identity.