Dark Crypto. Thorne Inc., #1

On paper, ex-mercenary Olivia Thorne is a private investigator for hire. These days, the money is good for someone who can navigate the slums around the quarantine zone, but it's even better for someone who can find kidnapped kids and bring them back to their wealthy parents. During the recovery of a ransomed girl, Olivia discovers a human experimentation ring that's using smuggled tech from the quarantine zone.
It was supposed to be an easy in and out job, but it's starting to become more trouble than it's worth. When a second mysterious client shows up at her office offering even more money for information and lethal ghosts from her dark past come calling, she had better learn to dodge bullets as quick as she's been dodging questions from the cops.