I read the main Earthsea Cycle books by Ursula Le Guin. Really enjoyed them, her prose is so evocative yet terse, especially in comparison to what would now be considered young adult fiction.
Ursula Le Guin has a gift for punchy prose. I've also read The Dispossessed and The Left Hand of Darkness by her and her ability to come up with truly novel, unique storyline and views of the world is incredible.
Earthsea is great. Ursula also wrote a lot of amazing science fiction: left hand of darkness, the dispossessed, the lathe of heaven, the word for world is forest etc. All are worth reading.