Which Books Feature A God Level Demon As The Main Antagonist?

Demon | Stockholm Syndrome | Possessive | Lust | Obsession A demon with a human; unthinkable. A king with his slave… A perfect combination. Gabrielle's life changes forever when she and her friends accidentally summon a demon one fateful night. Taken as a slave to the demon realm, she finds herself at the mercy of the Demon King of Lust. But Gabrielle is not made to be a slave, to bow down. Adrian is accustomed to unquestioning obedience. His existence takes an unexpected turn when he encounters Gabrielle, an innocent human who defies his every command. Driven by an insatiable need to dominate her, Adrian becomes captivated by the challenge she presents. But she is just a human, just a slave. Their kinds are destined to despise each other—light and darkness, innocence and lust. As their worlds collide, Adrian's lust for control becomes something far more dangerous. Can he resist her, or will his desire transform into something much, much more dangerous?

He died killing the Demon King. He woke up sixty years too early. Now the monster is a young man. And he is running out of reasons to stay away. --- Lysan Dusk was the hero who saved humanity. He killed the Demon King, ended the war, and delivered the world from suffering, and his reward was betrayal. He wakes up in a young student's body in a dormitory room of a magical academy, and the calender shows that the date sixty years before he was born. The world outside hasn't broken yet. The war hasn't happened. Lysan's plan is to keep it that way by staying completely out of it. Fail his combat exams, spend whatever borrowed time he has left, living a quiet life, where nothing requires him to be a hero. The man who will become the Demon King, the most feared monster in history is still young and beautiful, with pale grey eyes that find Lysan across every crowded room like he is the only person worth seeing. Lysan knows what those eyes will become. He has looked into them across battlefields, spent a lifetime seeing them in nightmares. He never expected it to feel like this up close. Roman is everything Lysan was warned about — magnetic, dangerous, impossible to ignore. Everyone except Lysan, refuses to be charmed, refuses to feel anything at all. But now, he is failing spectacularly at them because Roman keeps finding him. Keeps watching him and making Lysan's carefully rebuilt walls feel like paper. Lysan knows the ending. But for the first time in two lifetimes, he is wondering if the ending can change. If the monster can be loved instead of killed. If staying is braver than running.

“BEG ME, HUMAN," he growled, his grip on my hair tightening as he pushed harder. “BEG ME TO HAVE YOU.” I tried to say no, to resist, but I burned to have him. The pain was much but I found myself wanting him more. Kaelen was a skilled thief with a decent life—until he stole a cursed spellbook from the Inquisition and accidentally summoned Thrakos, the Demon King. Hoping to bind the demon to his will, the ritual backfired, leaving Kaelen magically and sexually bound to a horny Thrakos instead. Now a pawn in Thrakos’s war against his brother Vaelith, Kaelen gains dangerous powers but loses control. Hunted by Inquisitors, demons, and monsters, he must travel to Vermont to retrieve the Hell-blade—a sacred weapon forged to kill Vaelith. With Sylvia and a shapeshifting succubus at his side, Kaelen faces deadly enemies and the growing darkness within himself. With each climax and surge of power, Kaelen becomes less human and more demon. When the final battle comes, will he fight for freedom—or embrace his new nature and become the Demon King’s ultimate weapon?

Arianna had not planned on using magic to summon anything, she just wanted to get out of an arranged marriage. She was told of the ancient magic of summoning a guardian but instead she had summoned a demon—the demon king himself. But what would he ask in return for his loyalty to this princess?

Esteria, the queen of the northern human kingdom, was finally getting married to the vampire prince of her dreams. What began as a treaty between their two kingdoms had blossomed into a courtship where she had truly fallen in love. Life was perfect until darkness cast its shadow over her happiness. Her beloved vampire betrayed her, delivering a fatal blow. With her last breath, she made a desperate deal with a Demon God. "You will have to become my mate to gain the power to exact your revenge," he whispered in her ear, sending a shock through her dying body. This Demon God was not only breathtakingly gorgeous and immensely powerful, but he was also dangerously seductive. Now, he was offering her a deal that promised both vengeance and peril. Esteria’s mind was a storm of grief and fury. Could she handle the Demon God’s insatiable desires and the deadly power that came with their pact? Or would she be consumed by the chaotic demands of this new, dark world? "I will kill both of them. I will draw their last breath with my sword and burn their bodies with my fury," she vowed, her determination as fierce as the hellfire she now wielded.

“I didn’t just save your sister’s life, Elara. I bought yours. And I’m a man who expects a return on his investment.” Elara didn’t have options. Her sister was dying, the doctors had given up, and the only thing left in the house was an old grimoire and a ritual she was never supposed to touch. So she touched it. Now she belongs to Vane ,demon, Duke of the Seventh Circle, and the most terrifying man she has ever stood in front of. He doesn’t look like what she expected. He looks like someone who buys companies before breakfast and ruins people for sport. Cold, beautiful, and completely unbothered by the fact that he now owns her life. The deal was simple. Her sister lives. Elara obeys. Except the mark he burned into her skin doesn’t say owned. It says sacrifice. And the more time she spends inside his world , his rules, his house, his dangerous, suffocating presence ,the more she realises that Vane didn’t just answer her call that night. He’d been expecting it. She just doesn’t know why yet. And maybe that’s the most terrifying thing about him not the power, not the contract, not the way he looks at her like she’s something he’s been waiting centuries for. It’s that she’s starting to look back.