Beneath - Running from the Devil, #1

An escaped demon and a snarky cat face off against the seven deadly sins. Escaping from Hell was just the beginning of Phoebe's problems.  In Hell, she had a position of legend. A marquis of torture. But on the human plane, she is just another New York City destitute. Before she has a chance to get her bearings on the unforgiving streets, Fate steps in and offers her a chance at redemption, but it doesn't come cheap.
She must bring in the demons that escaped alongside her while making sure no humans are harmed in the process. In order to do that, she needs to learn to live in the human world with the help of another one of Fate's parolees, a snarky cat named Smoke. If it means never seeing the halls of Hell again, Phoebe will do anything, even battle the seven deadly sins single-handed.