Firefight, Paperback/Brandon Sanderson

The sequel to New York Times bestseller }Steelheart{ in the }Reckoners{ series. After David completed the impossible, killed Steelheart, there's a hole in his heart, once filled with a thirst for vengeance. Now this hole is filled with another epic, and he's willing to go on a quest darker and more dangerous than the fight against Steelheart.