Jacka, Benedict. Inheritance of magic series #3

"In a world where magic is controlled by wealthy families and vast corporations, one young man will need all the help he can get in this riveting contemporary fantasy from the author of the Alex Verus novels. Stephen Oakwood's ambitions used to be simple. Pay his bills, track down his father, and take care of his cat. Maybe study a little magic after work, if he had time. Now it's a year later and he's got everything he wanted. But it's come with a price. The Winged, a mysterious group involved with his father, have noticed Stephen, and they want him to join them or else. His career as a corporate locator has hit a dead end. And his new job as bodyguard to Calhoun Ashford is proving a lot more lethal than expected due to assassination attempts from outside the House, and possibly also from within. To survive, Stephen's going to need allies of his own. And along the way, he's going to have to figure out the secret of his own gift, and what it means. The cults, Houses, and corporations of the magical world are locked in an endless battle for dominance, and Stephen is beginning to realize that he's going to have to pick a side . . . before someone else picks it for him"-- Provided by publisher