Anno Dracula: Dracula Cha Cha Cha by Kim Newman
Rome 1959 and Count Dracula is about to marry the Moldavian Princess Asa Vajda. Journalist Kate Reed flies into the city to visit the ailing Charles Beauregard and his vampire companion Geneviève. She finds herself caught up in the mystery of the Crimson Executioner who is bloodily dispatching vampire elders in the city. She is on his trail, as is the undead British secret agent, Bond.