I answered a similar inquir at another board recently so forgive my cut/paste:
The EartheSea novels are probably what Ursula Leguin, a legitimate legend in specualtive fiction is most famous for, and are worthy reads even though her masterpieces most agree are The Left Hand of Darkness and Dispossessed, the former considered a true ground breaking work.
Earthsea has 5 full length installments:
The Wizard of Earthsea.
The Tombs of Atuan.
The Farthest shore.
Tehanu.
The Other Wind
The first 3 are solid, and entertaining, yet generally standard fare epic fantasy. I enjoyed them, but admittedly they have lost there luster now that I am older, but someone more inclined to epic fantasy would no doubt still enjoy them. The last two present a more adult oriented themes and are written with the more social concious and sociel relevant themes that are attributed to her earlier wirks (mentioned above Left Hand of Darkness, and Disposesed), and are the two best books in the series IMHO because of this. Popular opinion may not completely agree with that statement, as the first 3 novels remain most accesible to fans of traditional fantasy, and some have complained about the thematic change and the changes in tone that are as I said defintely noticeable as Leguin seemed to to start writing for a slightly older audience.
it also should be noted that there is a collection entitled Tales of Earth Sea that has related stories and another collection The Wind's Twelve Quarters that has 2 more Earthsea related stories in the collection.
Recommened? Defintely, especially for fans of epic fantasy, but no nearly as good as her Left Hand of Darkness, which as I mentioend is nothing less than a all time classic of SF.