Centyr Dominance - Michael G Manning

Moira Illeniel was the name she lived by, but her true heritage was more complicated than that. From birth, she was the secretly adopted daughter of the most powerful wizard in the world, but few knew that her true birthright came from the Centyr lineage. Traveling to Dunbar to discover the fate of her vanished father, Moira must face the darker aspects of her power. Forced to fight a foe unlike anything seen before in Lothion, she will learn the reason for the warnings her mother's shade gave her-why certain abilities should never be used and some lines never crossed-for some doors once opened, might never be closed again.