Inspired by real history, Rules of the Heart is the sweeping new novel from the bestselling author of The Other Bennet Sister, Janice Hadlow.Lady Henrietta Bessborough seemingly has it all: wife to a lord and sister to a duchess, she is welcomed in all the most fashionable circles. Yet she yearns for something her marriage has failed to offer: true love. When she meets the captivating Lord Granville, twelve years her junior and a famous heartbreaker, she at first dismisses his advances as opportunistic flattery. But then she sees another side to him a side she realizes she cannot resist. As she plunges into an all-consuming affair, Henrietta finds herself torn between her duty and her deepest desires.