"A winning addition to boundary-defying heroines like Alanna of Trebond and Sir Callie." --Publishers Weekly (starred review) "An exciting, twisty story packed with everything you want from a fantasy adventure: hidden tunnels, long-buried secrets, dastardly plots, and, best of all, irresistible protagonists who uncover it all." --Anne Ursu, author of Not Quite a Ghost In New York Times bestselling...