The Armored Saint (Sacred Throne, 1) [Cole, Myke]

In a world where any act of magic could open a portal to hell, the Order insures that no wizard will live to summon devils, and will kill as many innocent people as they must to prevent that greater horror. After witnessing a horrendous slaughter, the village girl Heloise opposes the Order, and risks bringing their wrath down on herself, her family, and her village.