Kingmakers

But the human armies are pinned down, battered by harsh weather and merciless attacks from vampire packs. To even the odds, Adele unleashes the power of her geomancy, a fearsome weapon capable of slaughtering vampires in vast numbers. However, the power she expends threatens her own life even as she questions the morality of such a weapon. As the war turns ever bloodier and Adele is threatened by betrayal, Gareth faces a terrible choice. Their only hope is a desperate strike against the lord of the vampire clans--Gareth's brother, Cesare. It is a gamble that could win the war or signal the final days of the Greyfriar.