This vividly imagined novel is about one of history’s most famous and controversial queens—the warrior who united a fractured country, the champion of the faith whose reign gave rise to the Inquisition, and the visionary who sent Columbus to discover a New World. When young Isabella and her brother are sent to live under the watchful eye of their half-brother, King Enrique, and his sultry, conniving queen, Isabella is thrust into danger when she becomes an unwitting pawn in a plot to dethrone Enrique. Suspected of treason and held captive, she treads a perilous path, torn between loyalties, until at age seventeen she suddenly finds herself heiress of Castile, the largest kingdom in Spain. Plunged into a deadly conflict to secure her crown, she is determined to wed the one man she loves yet who is forbidden to her—Fernando, prince of Aragon.