The Left Hand of Darkness is a science fiction picture book written by Ursula K. Le Guin. It is set on the planet Gethen, where the inhabitants are androgynous and can change their gender at will. The story follows a human envoy named Genly Ai as he navigates the complex politics and cultural differences of Gethen. The Left Hand of Darkness explores themes of gender, sexuality, and the nature of humanity. With its thought-provoking ideas and beautiful prose, this book is a must-read for fans of speculative fiction.