To Kill a Sorcerer (Immortal Montero Book 1);

Young billionaire Sebastian Montero has hunted killers for seven hundred years, the murder of his baby brother still haunting his dreams. After a teenage girl is ritually butchered, Sebastian joins the LAPD in their search for the man known as “The Voodoo Killer.”

When Sebastian is nearly strangled by malevolent spirits invading his home, he realizes his target is a man with formidable magical powers. But he doesn't know just how dangerous the Voodoo Killer has become.