Magic really exists—it is hidden in ancient texts and artifacts; it is insatiable, and contact with it puts you on the brink of survival. Inspector Sal Brooks knows how to survive. Once she discovers this dangerous world, it immediately turns her into a member of a secret division created under the auspices of the Vatican and tasked with fighting magic: the Third Squad, or Societas Librorum Occultorum. Their job is to save the world from a magical apocalypse. They are also called book hunters. The nickname doesn’t really suit them.