Marked by Shadow. Chronicles of an Earned, #3

Unwittingly, Nathan unlocks a spell and becomes the master of a man enslaved by shadow. While sorting through an old estate in the basement of an auction house, Nathan finds a gold bracelet with strange markings on it. He recognizes it as an ancient language and reads the inscription out loud. This makes him the master of a man, Lucien, cursed into shadow by the Thule society during WWII. As this whole new world of the paranormal is revealed to Nathan, he finds both love and fierce loyalty from Lucien, the man now bound to him.
Nathan's going to need that loyalty because the men who made Lucien into what he is want him back. And they are willing to kill anyone who stands in their way. Strap in for a series with massive worldbuilding containing demigods, witches, angels, demons, fay, secret orders, curses, magic, and so much more!