She went undercover to destroy him. He knew from the start—and let her in anyway. Interpol agent Elise Gray is a ghost—trained to lie, disappear, and dismantle monsters from the inside. Her latest mission is off the books and personal: infiltrate the empire of Maximilian Voss, an untouchable Italian billionaire whose luxury hotel chain hides one of Europe's darkest human-trafficking networks. To get close, Elise becomes Helena Dubois, a brilliant, ice-cold art curator handpicked to work inside Voss's world. Every smile is calculated. Every step is a lie. One mistake means exposure—and death. But Maximilian Voss is not the monster she expected. Dangerously intelligent. Ruthlessly controlled. And far more aware of her than she should be comfortable with. As the line between predator and protector blurs, Elise uncovers evidence that could burn his empire to the ground—only to realize she may be a pawn in a far more lethal game. Because Voss isn't just watching her. He's testing her. Challenging her. Claiming her. In a world where power is currency and loyalty is bought in blood, Elise must decide what she's willing to sacrifice—her mission, her identity, or her heart. Undercover Devil's Claim is a dark, high-stakes billionaire romance packed with espionage, moral ambiguity, explosive tension, and a dangerous enemies-to-lovers dynamic—where falling in love may be the deadliest mistake of all.