When Among Crows by Veronica Roth (Fantasy)

Step into a city where monsters feast on human emotions, knights split their souls to make their weapons, and witches always take more than they give.

Pain is Dymitr’s calling. To slay the monsters he’s been raised to kill, he had to split his soul in half to make a sword from his own spine. Every time he draws it, he gets blood on his hands.

Pain is Ala’s inheritance. When her mother died, a family curse to witness horrors committed by the Holy Order was passed onto her. The curse will claim her life, as it did her mother’s, unless she can find a cure.