The list is much longer than this, I just picked out some highlights for you.

Ursula K. LeGuin - The Dispossessed, The Other Wind (The Earthsea Cycle, Book 6), The Earthsea Trilogy
Robin Hobb – The Liveship Traders Trilogy Ship of Magic (The Liveship Traders, Book 1) Mad Ship (The Liveship Traders, Book 2)Ship of Destiny (The Liveship Traders, Book 3)
Ray Bradbury – Fahrenheit 451
C.J Cherryh – Cyteen
Robin Hobb – Assassin's Apprentice (The Farseer Trilogy, Book 1)
Guy Gavriel Kay – The Last Light of the Sun
Sheri Tepper – Grass
Julie Czerneda – In the Company of Others
Rachel Caine – Weather Warden Series Ill Wind (Weather Warden, Book 1)
Margaret Atwood – The Handmaid's Tale: A Novel
Stephen Donaldson – Lord Foul's Bane (The Chronicles of Thomas Covenant the Unbeliever, Book 1)
Lois McMaster Bujold - The Curse of Chalion
Steven Brust The Book of Jhereg (Vlad Taltos)

Patricia McKillipp, Riddlemaster (the trilogy). Riddlemaster of Hed,(1st book in the series)