The House of Broken Backs — Amy Cross

When thirty badly injured women are found crawling through a rural wilderness, it quickly becomes clear that someone is running a grotesque human farm. Meanwhile, in a suburban house, a dangerous man plots his next move. For decades, he's been building a horrific empire based on torture and cruelty. With the police closing in, he realizes he needs to make his final move, but first he has to tidy up the loose ends of his three separate identities. Three families. Three wives. Three children. And they all need to die. Detective Joanna Mason's investigation is complicated by the fact that she's been assigned a new partner who seems determined to trip her up. She's also losing the only friend she ever really had. As the dead bodies begin to pile up, Mason is forced to recognize the fact that this time, her usual methods might not be enough to solve the case.