Rebirth (Dread Knight, Book 4) - Sarah Hawke

An unexpected alliance. A forgotten relic from a lost civilization. A final battle against the forces of darkness. As a grizzled veteran of the war against the Riven, Duncan knows better than anyone that great triumphs require terrible sacrifices. But as the final battle looms on the horizon, victory seems like a distant fantasy…until he receives word of a holy artifact even more powerful than Aodar’s blade. To find it in time, he and the girls will have to venture into the corrupted wastelands