Best Served Cold by E.M. Denning

Jeremy Jenkins’ mother was a drug addict, his foster families abusive. The man he thought the love of his life had just betrayed him in the most catastrophic way possible.
He stabbed him.
On the night of his death, he cries out. Jeremy doesn’t seek help or forgiveness, he craves revenge. In answer to his plea, Ozark appears before him with the promise of a future he never could have imagined.
Oz is a demon older than time. Feeding off revenge, he’s spent millennia reaping and selling souls. The contracts are simple: Oz helps someone achieve revenge, then hell gains another soul.
Jeremy takes the deal, but when the time comes, Oz releasing him to join the faceless ranks of hell’s ghouls is one more betrayal in a long line. He yearns to join the gorgeous demon for eternity; by his side and in his bed. Desperately searching for a loophole, he’s running out of time. Can Jeremy outwit those who fight against him and bend the laws of hell to keep the dangerous demon who’s captured his heart? Or is he destined to die as he lived?
Betrayed and alone.