The Reaper - Jackson P. Brown

Amy is an empath, able to sense the auras of the supernatural creatures that stalk London at night. But sorely lacking in knowledge, she spends night after night searching for answers. Gerald is a Reaper - a weapon for hire - on the verge of his Awakening. Of coming into his power and becoming the man his family need him to be. The man they demand he be. When Amy stumbles across Gerald one night, she notices his strange aura, unlike anything she has felt before. Afraid, but desperate to know more, she follows, and he makes her an offer she can't refuse. If she becomes his partner, he will introduce her to a world she has only ever felt the shallow surface of:the secret underground city And their first mission together: Find a girl who murdered her own parents