Nightshades

A federal agent in Chicago is charged with stopping a vampire crime surge in this urban fantasy thriller series debut.
Humans have never been all that comfortable with the knowledge that they coexist with otherworldly bloodsuckers known as shades. Yet life does go on . . . with some adjustments. The Bureau of Paranormal Investigations has special authority to apprehend shades—or vampires as they're more widely known—who break the law.
Alex McKenna is the new Special Agent in Charge of the BPI's Chicago office. And he has plenty to keep him busy. Children have been going missing, and agents are routinely being slaughtered. It's up to McKenna, and some unlikely allies, to get to the bottom of the problem, and find the kids before it's too late.