White Devil (Chronicles of the Bat, Book 2) by Janina Franck
Not everyone can use magic, but it has always been a part of the world, used to expand and enrich the lives of people everywhere. But magic is powerful, and power can be corrupted. When a dark power sweeps across the land, extinguishing magic wherever it is found, a small region in the mountain tops is caught up in the fray. Now it is up to Lilith, the newest resident of the Highlands, to travel the world, accompanied by a small group of misfits, and search for the ancient artifact which just might save her home.