Sister Light, Sister Dark

A warrior woman and her dark twin are destined to remake the world in this "powerful" tale, the first in a trilogy by a World Fantasy Award winner (Newsweek).
Legend foretold the child named Jenna, who was three-times orphaned before she could crawl, a fate that would leave her in the hands of women who worshipped the benevolent goddess Great Alta. In this world without men, Jenna comes of age, learning quickly the skills of close combat. But her most powerful gift lies elsewhere: a mirror sister who emerges only in the darkness—a twin named Skada—and shares the soul of the young, white-haired warrior who might well be the goddess reborn. But if Jenna is, in truth, the one whose coming is awaited, there is cause for great alarm among those who rule the Dales, for the prophecy speaks of upheaval and change, and a devastating end of all things.
An incomparable world-builder and one of America's premier fantasists, the remarkable Jane Yolen...