Royal Blood (A Royal Spyness Mystery)

With her hateful brother Binky in town, Lady Georgiana has been desperately seeking an escape. So when an invitation from the Queen arrives to represent the royals at a wedding in Transylvani-legendary home of vampires-Georgiana is delighted to accept. But when the bride starts acting a little batty and a prominent wedding guest is poisoned, something must be done lest the couple's vows become "till undeath do they part..."