Shakespearean Vampire — Susan Hart

Book 5 in the series, The Foxworthy Files. The Shakespearean Vampire - FBI agent Lili Foxworthy and her brilliant actor husband Peter Wolff, head off to England where Peter is to teach a six-week long master class at the Royal Shakespeare Company. There’s evil, afoot, though, and they run into a long-established Ancient Roman vampire and are on the receiving end of all that can entail.