States of Grace

Franzicco Ragoczy di Santo-Germano is a successful merchant in Venice. His lavish lifestyle and rumored cache of magnificent jewels have attracted the wrong sort of attention, and without Santo-Germano's noble--and papal--connections, he might be imprisoned, his property confiscated. Also under surveillance is the vampire's mistress, the lovely and talented musician Pier-Ariana Salier.
Elsewhere, Ragoczy's publishing business is being investigated by the Inquisition. Erneste van Amsteljaxter, a writer whose intelligence Ragoczy finds attractive, is tarred with the brush of heresy. Ragoczy is trying to help her, when he learns that Pier-Ariana has disappeared.
Back in Venice Santo-Germano finds that his fortune has been embezzled, and that he is accused of kidnapping, and possibly murdering, a young man who had been spying on the vampire and his mistress. Another spy has discovered Santo-Germano's true nature and intends to kill him before he can feast on all of Venice

Chelsea Quinn Yarbro is the author of more than twenty novels of the life and times of the Count Saint-Germain and other vampires, including Dark of the Sun, Night Blooming, Midnight Harvest, A Feast in Exile, and the classic Hotel Transylvania. She has also written novels in a wide variety of other genres, including SF, fantasy, mystery, horror, western, and young adult adventure.