The Riddlemaster Trilogy
"What can I do for you?"
"Free the winds."
"Yes. How?"
"One star will call out of silence the Master of the Winds; one star out of darkness the Master of Darkness; one star out of death the children of the Masters of the Earth. You have called; they have answered."
"Who is —"
"The war is not finished, only silenced for the regathering. You will bear stars of fire and ice to the Ending of the Age of the High One —"
"But we cannot live without the High One —"
"This we have been promised. This will be."
Patricia McKillip has written many books, but this trilogy, beginning with The Riddle-Master of Hed is my favorite. They're magical books, by which I mean the writing, the language, is magical.
No official website, but a fan has put up a page where you can find more about her books: http://www.evan.org/McKillip.html