With Thomas Cromwell fallen and her rival’s schemes in ruins, Katharine Howard stands at the summit of Tudor power as Henry VIII’s crowned queen. Yet the court she now presides over is no less treacherous for the removal of its greatest schemer. Around her, Protestant and Catholic factions maneuver ceaselessly for mastery of the king’s conscience, and the very virtues that won Katharine Henry’s devotion—her candor, her learning, her uncompromising...