Underground airlines

"It is the present-day, and the world is as we know it. Except for one thing: slavery still exists. Victor has escaped his life as a slave, but his freedom came at a high price. Striking a bargain with the government, he has to live his life working as a bounty hunter. And he is the best they've ever trained. A mystery to himself, Victor tries to suppress his memories of his own childhood and convinces himself that he is just a good man doing bad work, unwilling to give up the freedom he is desperate to preserve. But in tracking his latest target, he can sense that that something isn't quite right. For this fugitive is a runaway holding something extraordinary. Something that could change the state of the country forever. And in his pursuit, Victor discovers secrets at the core of his country's arrangement with the system that imprisoned him, secrets that will be preserved at any cost."