From theNew York Timesbestselling author ofSorcery of ThornsandAn Enchantment of Ravenscomes a thrilling new YA fantasy about a teen girl with mythic abilities who must defend her world against restless spirits of the dead.The dead of Loraille do not rest.Artemisia is training to be a Gray Sister, a nun who cleanses the bodies of the deceased so that their souls can pass on; otherwise, they will rise as twisted spirits with a ravenous hunger for the living. She'd rather deal with the dead than the living, who point and whisper about the odd girl who was once possessed by a violent spirit.When her convent is attacked by possessed soldiers, Artemisia fights back by awakening an ancient spirit bound to a high saint's relic.It is a revenant, a malevolent being that threatens to possess her the moment she drops her guard. Wielding its extraordinary power almost consumes her--but death has come to Loraille, and only a vespertine, a priestess trained to wield a high relic, has any chance of stopping it. With all knowledge of vespertines lost to time, Artemisia turns to the last remaining expert for help: the revenant itself. As she unravels a sinister mystery of saints, secrets, and dark magic, her bond with the revenant grows. And when a hidden evil begins to surface, she discovers that facing this enemy might require her to betray everything she has been taught to believe--if the revenant doesn't betray her first.