Windsingers quartet, also sometimes referred to as "the Ki and Vandien books" are stories published under the pseudonym Megan Lindholm.
The actual quartet consists of four novels:
-  Harpy's Flight (1983)
-  The Windsingers (1984)
-  The Limbreth Gate (1984)
-  Luck of the Wheels (1989)
There are also two short stories set in the same world:
Numbers in brackets show the assumed chronological order of the stories.
US cover art for the novels
UK cover art for the novels
cover art for works that include the short stories