Harpy's Plea (Book Three of the Fey Files)

The most deadly Fey ever made have been loosed upon the civilized world and the dead are already piling up, but that is only half the problem. Who freed them and do they have a reason? If so, what is it and how bad will things be if they achieve their goal?
They did make a massive mistake though. They endangered a Banshee's brood-mate and her whole family. There will be no mercy.