Night Broken - Patricia Briggs - Paperback

Mercy Thompson, 8 book  of 14 ongoing series

When her mate's ex-wife storms back into their live, Mercy knows something isn't right. Christy has the furthest thing from good intentions, she wants Adam back, and she's willing to do whatever it takes to get him, including turning the pack against Mercy.

Mercy isn't about to step down without a fight, but there's a more dangerous threat circling. As the bodies start piling up, she must put her personal troubles aside to face a creature with the power to tear her whole world apart.