Marked by Sin - The Gatekeeper Series, #1

An assassin's work is never done. With forty-nine hits under my assassin belt, ascension is one kill away. Better pay and a swanky flat in Soho are all part of the deal. All I need to do to achieve my goal is take out one more scumbag. No big deal. Until it is. When a man with golden eyes and epic wings interrupts my ascension ceremony, everything I knew to be true is turned on its head. I'm a weapon. A key. And I'm one kill away from unlocking the gates to the underworld and unleashing a legion of demons. It's time to atone and fast. But atonement comes with its own price.
Problem is, I'm not sure I'm up to paying it.