Changeling (Order of Darkness #1) by Philippa Gregory

Format : Paperback 

Condition : New but 

Genre : Historical Fiction 

In 1453, seventeen-year-old Luca Vero, accused of heresy and expelled from his monastery, is recruited to help investigate evil across Europe but frees his first subject, Isolde, from captivity in a nunnery, and together they seek the one who defends the boundaries of Christendom and holds the secrets of the Order of Darkness