Inspired by real history, Rules of the Heart is the sweeping new novel from the bestselling author of The Other Bennet Sister, Janice Hadlow. Propriety of conduct was never my forte, so that if any lady chooses to make observations, they will always have enough to find fault with. 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. For in a world where appearances are everything, each anxious but besotted step she takes leads her ever closer to scandal and ruin . . . Praise for The Other Bennet Sister: 'Immersive and engaging' – The Guardian 'It’s difficult not to race through those final pages' – Jo Baker, bestselling author of Longbourn 'A novel that will delight Pride and Prejudice fans' – The Independent