Not sure if when you say "Earthsea - LeGuin - All" you mean just all Earthsea, or all everything she's witten. If you haven't read any of her other stuff, why. The. Fuck. Not? She has a lot of other stuff she's written, and, personally, I think a lot of it is better than Earthsea (don't get me wrong, Earthsea was amazing).
"Siddhartha" by Herman Hesse. It's short, though (like, 100 pages). But it's a good read.
"Ishmael" by Daniel Quinn. A fast, but highly interesting read. This and Siddhartha are pretty deeply philosophical.
"Flowers for Algernon" by Daniel Keys. Short, and the end was depressing (for me), but just the way it's written is worth reading it to see.
Anything by H.P. Lovecraft. It's pretty dark stuff, extremely unique, written mostly in the 1920s and '30s. But, this might classify as "makes you want to slit your wrists" depending how easily creeped out (not scared, but creeped out) you are. I think some of his stuff has expired from copyright, so you should b able to find it on Project Gutenberg.
Th Pendragon seris by D.J. MacHale.
Please, dear God, don't tell me you've never read any Arthur C. Clarke. He's up there right next to Asimov in the "sci-fi genii" hall of fame.
On the same note, Micheal Crichton has a bunch of good books. Not the greatest literature ever, but it's good stuff and it turns pages. If you've never read anything by him, you should be ashamed of yourself.
Anthony Burgess' "A Clockwork Orange". Oh god, the language. He uses made-up words and it can be tricky at times, but it's great none the less. Short, though.
"One Flew Over The Cuckoo's Nest" by Ken Kesey. Just a good story about some crazy people, but kind of short.
Steven King has a couple of shining jewels. "The Stand" (get the unabridged/longer version, it's like 800 pages) was one I just loved. "The Shining", of course, is great too, but a bit creepy at times. "Cujo" was interesting.
Nancy Farmer's "The House of the Scorpion". Semi-long, pretty good.
"Dubliners" by James Joyce. It's not impossible to read- I read it in 7th grade, but should probably re-read it. It's short, though, just a collection of short stories. A pretty Modernist piece- not much definite plot in some of the stories, just everyday-ish situations.
If you're into denser non-fiction at all, I found Gandhi's autobiography very interesting. But it can be a hard read for a lot of people, so no love lost if you don't like it/don't want to read it.