In bestselling author Shayla Black's electrifying fourth novel in the Doomsday Brethren series, the wizards fight their mortal enemy for the newest weapon in a bloody magical war: the one woman a warrior shouldn't claim...yet can't resist. Dangerously handsome Simon Northam, Duke of Hurstgrove, and his uptight brother Mason are hardly close, but crashing Mason's wedding and stealing his fianc e further aggravate their sibling rivalry...