Drain Me — Lana Sky

When diagnosed with a fatal illness at the age of twenty six, Eleanor Gray is resigned to her fate -- at least until the enigmatic Dublin Helos appears and makes her an offer she knows she should refuse: Life or Death? With a decision as harmless as checking the wrong box on a mysterious questionnaire, Ellie is plunged into a dangerous world where souls are sold to the highest bidder and pleasure is fueled by pain. The rules of this new life are simple: submit everything -- mind, body and soul. But the further Ellie falls under Dublin's control, the more she comes to realize that it's not just her sanity at stake, but her heart and a whole lot of blood too.