Silver under nightfall
(Book)

"Remy Pendergast is many things: the only son of the Duke of Valenbonne (though his father might wish otherwise), an elite bounty hunter of rogue vampires, and an outcast among his fellow Reapers. When a terrifying new breed of vampire is sighted outside of the city, Remy prepares to investigate alone. But then he encounters the shockingly warmhearted vampire heiress Xiaodan Song and her infuriatingly arrogant fiancé, vampire lord Zidan Malekh, who may hold the key to defeating the creatures--though he knows associating with them won't do his reputation any favors. When he's offered a spot alongside them to find the truth about the mutating virus Rot that's plaguing the kingdom, Remy faces a choice"--,Provided by publisher.