The Dark in Her Veins (Divine Villains, #1)

"In Valestadt, everything has a price. Sinning leaves its mark in the form of the Bloodrot, a slow-creeping disease that leads to madness, then death. Most sins are negligible, but murder-committed enough-can be fatal. For the rich, violence is something to be outsourced. For the poor, it's a paycheck that comes with a cost. Talin Keller is a sinner. Employed by the holiest man in the city, the Prophet, she gets her hands dirty so his can stay clean. And with her Bloodrot rapidly advancing, Talin knows her next job could be her last. But when a new assignment puts Talin on a collision course with a shadowy figure known as "the Warden," she begins to see a future for herself that doesn't involve a body bag. If she can get close enough to the Warden, she can trade his life for her own freedom. That is, if she can keep her balance on the knife's edge. The closer Talin gets to the Warden, though, the more she finds herself falling for his sharp edges and twisted sense of justice. As savior and sinner bleed together, Talin finds the real threat isn't either man - but a conspiracy tied to the past she hoped was dead"-- Provided by publisher.