We Are Not Good People

From the "exhilarating, powerful, and entertaining" (Guardian) storyteller of the Avery Cates series comes a gritty supernatural thriller featuring a pair of unlikely heroes caught up in the underground world of blood magic.
The ethics in a world of blood are gray—and an underground strata of blood magicians has been engineering disasters for centuries in order to acquire enough fuel for their spells. They are not good people.
Some practitioners, however, use the Words and a swipe of the blade to cast simpler spells, such as Charms and Cantrips to gas up $1 bills so they appear to be $20s. Lem Vonnegan and his sidekick Mags fall into this level of mage, hustlers and con men all. Lem tries to be ethical by using only his own blood, by not using Bleeders or "volunteers." But it makes life hard. Soon they might have to get honest work.
When the pair encounters a girl who's been kidnapped and marked up with magic runes for a ritual spell,...