The Devil You Know by Nicole Northwood

In the Underworld, nothing ever changes.

When the demon of Lust, Cam, decides he needs an overhaul in his ‘life after death’, he leaves the Second Circle of Hell to run an indulgent hotel and club in the heart of New York City. As his lover, Lucifer, bides his time to create a bargain to have Cam return, Cam is permitted to explore the human world, but not without being led into temptation. A group of demon hunters disguised as police set out to send Cam back into the fires of Hell by getting him lost in desire for one of their own, but things very quickly take an unexpected turn—Cam’s fallen in love with the Hedonism Hotel’s night manager, Giselle, and he won’t leave Earth so easily.