The Disappeared: A Retrieval Artist Novel (Unabridged‪)‬

Retrieval Artists help the lost find their way back home, whether they like it or not. Specialized private detectives, they investigate the most unusual crimes in the galaxy. But Miles Flint isn't a Retrieval Artist. He's just a cop, trying to do his job.
In a stolen space yacht, three people have been found eviscerated, the grisly signature of an alien vengeance killing. Moments later, the border patrol halts another ship launched out of the moon's orbit. Its passengers are two human children, kidnapped by the most ruthless aliens in the universe. Both ships are linked to a woman on the run: a Disappeared relocated to the inhospitable landscape of Mars. A reluctant outlaw with a bounty on her head and a detective on her case, she's about to teach all of them a lesson: it's dangerous to gamble with your life in a universe that rigs the game.