Industrial Magic ~ Kelley Armstrong

This is book four in the Women of the Otherworld series. Again we are back with Paige and Lucas, who are now living in Portland. There is a problem within Lucas's father's Cabal, and his father has attempted to enlist Lucas's help to investigate. As they investigate the issue, in Miami, they discover it is not just the Cortez Cabal, but all four of them in the U.S. Now they have to find who is killing Cabal teenagers, and why. Without getting themselves killed, or worse.