Crave by Charity Parkerson

Lire is a demon. An addiction. A curse. Dougal’s only hope.
Now that the Hellish clan has their first real lead on the whereabouts of the demon pack they’ve been hunting, they’re off to New Orleans, minus one—Dougal.
When Dougal traded his life for Jonathan’s, he had no idea what he’d done. He’d expected the demon, Lire, would kill him—not keep him as a toy. With his mind a mess and no hope in sight, Dougal’s completely at Lire’s mercy. Luckily, Lire has one weak spot, and his name is Jonathan.
In this third installment of Hellish, Jonathan’s attention is split between helping Dougal find a way to survive the damage he suffered as Lire’s prisoner and saving the world from whatever the demons have planned for the humans. With Mammon, the fifth prince of hell running loose, things aren’t looking great.
With the help of new friends and old, Hellish might have a shot at stopping Mammon from unleashing his evil on the world. Then again, sometimes greed wins the day.