The Left Hand of Darkness is a science fiction novel written by Ursula K. Le Guin. It takes place on a planet called Gethen, where the inhabitants have no fixed gender. The story follows a human envoy who navigates the complex social and political landscape of Gethen. The book explores themes of gender, sexuality, and cultural differences. The Left Hand of Darkness has received critical acclaim for its thought-provoking exploration of alien societies and remains a popular choice among readers on Amazon.