Unleashed — Jacob Stone

There's a new demon in the City of Angels. The Cupid Killer targets couples in love, unleashing on them a pure animal savagery.

L.A. detective Morris Brick has never hunted a psycho who's taken such sadistic pleasure in destroying people's lives. The surviving victims have all identified the killer's snarling wolf tattoo. Now Brick knows he's on the trail of a brutal predator who's taunting him. But there's a dark secret behind the Cupid Killer and the danger is closer to home than Morris imagines . . .

Expertly alternating between past and the present day, Unleashed is the very best kind of suspense thriller, one where the twists and surprises will shock even the savviest reader.