Ursula Kroeber Le Guin is a major American science fiction and fantasy author. She is best known for her Earthsea novels for young adults and her Hainish Cycle of science fiction novels about various planets with humanoid inhabitants seeded from the same genetic stock but with differing societies (and sometimes evolved or deliberately altered biologies). Her leading characters are often social scientists, particularly anthropologists. Le Guin is not solely known for treating feminist themes, but some novels in which gender and feminism feature prominently are: