Quite a few of LeGuin's books are shelved in children/young readers sections of the libraries. I don't really know why it is so, as her tales are universally readable, enjoyable and there is nothing childish or simplistic about them - in some ways they are more grown up that many supposedly adult examples of fantasy (and no, I don't mean Gor). They certainly have a universal appeal, as "proper" myths, fairly tales and legends often do.