Wikipedia
Liavek
Liavek is a series of five fantasy anthologies edited by Emma Bull and Will Shetterly set in a shared world.
Orson Scott Card found the initial volume to be "an example of what can be accomplished [in a shared-world project] when almost everything goes right."
The collections were published by Ace Books with contributors including Bull, Shetterly, Gene Wolfe, Jane Yolen, John M. Ford, Kara Dalkey, Barry B. Longyear, Megan Lindholm, Nancy Kress, Patricia C. Wrede, Steven Brust, Nate Bucklin, Pamela Dean, Gregory Frost, Charles de Lint, Charles R. Saunders, Walter Jon Williams, Alan Moore and Bradley Denton. Related works, including a comic book, have been brought out by other publishers.