England flourishes under the hand of Elizabeth I, last of the Tudor monarchs. But a great light casts a great shadow. In hidden catacombs beneath London, a second queen holds court: Invidiana, ruler of faerie England, and a dark mirror to the glory above. In the thirty years since Elizabeth ascended her throne, fae and mortal politics have become inextricably entwined, in secret alliances and ruthless betrayals whose existence is suspected only by a few.When the faerie Lady Lune is sent to monitor and manipulate Elizabeth's spymaster, Walsingham, her path crosses that of Michael Deven, a mortal gentleman and agent of Walsingham's. His discovery of the "hidden player" in English politics will test Lune's loyalty and Deven's courage alike. Will she betray her queen for the sake of a world that is not hers? And can he survive in the Machiavellian world of the fae? Only together will they be able to find the source of Invidiana's power-find it, and break it...