The Angel of Death by Jane Wallace-Knight
Six months ago Sam Reed’s life was changed forever. Not only did he discover that his father was an angel, but he was also turned into a vampire. On top of that Sam met his fated mate, an alpha werewolf named Jackson Harcourt, who already had a lover of fifty years, a vampire named Alek Harcourt. Miraculously the three of them built a life together and had enjoyed six months of relative bliss.
Everything changes, however, when Sam meets the father he never knew and is warned of a terrible threat. The Brotherhood of the Righteous is a sect of angels who hunt down demons and all that descend from them. A nephilim turned vampire is at the top of their hit list. With a clock ticking down and newfound powers that he can’t control, Sam and his mates must decide what is best for their pack, and whether they should run, or fight.
The Angel of Death is available here from Siren BookStrand.