The Shadowglass: Bone Witch #3 (The Bone Witch, 3, Band 3)

Tea is a bone witch with the dark magic needed to raise the dead. She has used this magic to breathe life into those she has loved and lost and those who would join her army against the deceitful royals. But Teas quest to conjure a shadowglass - to achieve immortality for the one person she loves most in the world - threatens to consume her heart. Teas black hearts glass only grows darker with each new betrayal. And when she is left with new blood on her hands, Tea must answer to a power greater than the elder asha or even her conscience...