Which book by Ursula K. Le Guin features a society where individuals do not have a fixed gender, challenging gender and sexuality norms?

The Left Hand of Darkness

In "The Left Hand of Darkness," Ursula K. Le Guin introduces us to the planet Gethen, where the inhabitants can change their biological gender. This unique setting allows Le Guin to explore themes of gender fluidity and sexual identity, long before these discussions became prevalent in current society. Her pioneering work has greatly contributed to the introduction of gender issues in the realm of science fiction, challenging readers to rethink their own biases and conceptions. "The Left Hand of Darkness" is considered a classic of science fiction, not only for its captivating plot but also for its profound cultural and social impact.