Diane Farr’s clever Regency romantic comedy “Duel of Hearts.” Lilah Chadwick and Adam Harleston, the tenth Earl of Drakesley find themselves headed straight for each other’s laps at the altar. Lilah meets Drake while rushing to London to thwart her father’s marriage proposals. They decide that falling in love is never a mistake and make a joint promise to prevent it. Their loved ones from committing grave mistakes.