The Mark of the Midnight Manzanilla (Pink Carnation #11) by Lauren Willig

In the latest Pink Carnation novel from national bestselling author Lauren Willig, rumors spreading among the ton turn deadly as a young couple unites to solve a mystery....

In October of 1806, the Little Season is in full swing, and Sally Fitzhugh has had enough of the endless parties and balls. With a rampant vampire craze sparked by the novel The Convent of Orsino, it seems no one can speak of anything else. But when Sally hears a rumor that the reclusive Duke of Belliston is an actual vampire, she cannot resist the challenge of proving such nonsense false. At a ball in Belliston Square, she ventures across the gardens and encounters the mysterious Duke.