The Turning (Sundered Dominion, #1)

(This book can be read as a standalone piece.) Welcome to Azaria, a land of forgotten myths and mysterious ruins. Here are creatures in human shells who can kill with a thought. They call themselves Others. They crave power and view mankind as chattel. Here also is a secret order of knights who ensure the Others remain little more than a legend: assassins with the discipline to move faster than their enemies can think. They dedicate their brief lives to tracking down and killing these monsters. Sienna was born with an Other in her head. When her home is destroyed by an Other‘s evil spell, she vows to use the power within her for revenge. If she loses control of it, even for an instant, she will go insane and become one of them. Her only companion, a cold assassin, leads her through mutants, madmen, battles, cruel landscapes, and horrors beyond imagining. With enemies on all sides, she struggles to survive. Yet her greatest trial will be defending herself from possession by her own inner demon.