Say Yes to the Duke by Eloisa James

Miss Viola Astley is so painfully shy that she’s horrified by the mere idea of dancing with a stranger; her upcoming London debut feels like a nightmare. So she’s overjoyed to meet handsome, quiet vicar with no interest in polite society — but just when she catches his attention, her reputation is compromised by a duke. Devin Lucas Augustus Elstan, Duke of Wynter, will stop at nothing to marry Viola, including marrying a woman whom he believes to be in love with another man. Devin knows he’s no saint, but he’s used to conquest, and he’s determined to win Viola’s heart.