Driven

CAINS ARE KNOWN for being big, brutish and not-too-bright. The mutt clan embodies all the supernatural world's worst stereotypes about werewolves. But not even the Cains deserve to be hunted down and skinned like animals.

When young Davis Cain comes to the Pack for help, Alpha Elena Michaels can't refuse him. It isn't about morality or justice. It's about not letting anyone think they can do this to werewolves and get away with it.

But Elena is also dealing with the Pack's homegrown monster--Malcolm Danvers, onetime enforcer, full-time psycho. Malcolm is now under Elena's control, as part of the most difficult decision she's had to make as leader. But if she has to let Malcolm in, she's going to make full use of him...and the best person to catch monsters is one who knows exactly how they think.

This description comes from the publisher. Driven is part of the Otherworld series, the first of which is Bitten.