Wall Street Journal bestselling author Jeff Wheeler continues his wondrous Harbinger series in which two young women unite as two worlds approach the brink of war… Though relations between Princess Seraphin Fitzempress and her father have been strained, Sera’s royal position has remained unchallenged. Filled with self-doubt, she struggles to grasp the Mysteries—her greatest trial yet. An education in the enigmatic magic is a necessary one, should Sera plan to rise in her station and invoke her powers during war. But the emperor’s death now leaves both Sera and her ambitious father...