From New York Times bestselling author Mary Balogh comes the first novel in the Horsemen trilogy, a scandalous romance of yearning passion and dangerous desires... In the country visiting his twin brother, Viscount Rawleigh longs for a little diversion and beautiful young widow Catherine Winters seems like easy prey. But Rex’s target is a lady of virtue, and when she roundly rejects his improper proposal to become his mistress, Rex finds himself faced with a delectable challenge. Catherine knows she must fight the indecent feelings the Viscount arouses within her—feelings that bring to life a past she had sought to escape—even as the handsome lord refuses to relent in his amorous attentions. But even though she knows one kiss could bring her to ruin, temptation proves an insurmountable foe—and Catherine can not ignore the beating of her treacherous heart....