The Vampire by Sandrine Genier

Jason Sterling never meant to put his life, or anyone else's, in danger when he accepts an unusual job offer. The Genier law firm's good reputation reassures him all is well. The alluring and mysterious Augere becomes his obsession. The sumptuous home on Beacon Hill is far from the bayous of Louisiana and the now decaying structure in Savannah where Augere's existence was forever changed. A dream trip to Europe hints at a reality different from what Jason knows. When a terrifying incident occurs Jason believes he is the victim of a bitter betrayal. But all is not as it seems.