"I think my boyfriend is trying to kill me." For three months, Valerie thought she was the luckiest girl alive, living in a luxury penthouse with a man who seemed entirely too perfect. But when a record-shattering heatwave strikes the city, plunging the world into a stagnant, fifty-six-degree incubator, the perfect mask slips. Julian doesn't sweat. He doesn't breathe. And he isn't human. Trapped in a dead apartment with a cold-blooded apex harvester who views her as nothing but prime genetic livestock, Val is forced to rely on her sharpest instincts just to survive the night. But as the old world rots under the scorching sun, her desperate defiance triggers an evolutionary spark within her own neural pathway: a mysterious, conceptual ability known as [Cardify]. The apocalypse has arrived, but Val is no longer playing the victim. In a world turned into a deadly wonderland, she will flatten her enemies, pocket the ruins of civilization, and rewrite the rules of survival—one card at a time.

Three years ago, Linnea Hale’s world burned when her father was executed. She escaped into the dark, transforming herself into a lethal weapon with one goal: total revenge. But running into the territory of Damien Kane—the ruthless, towering Sovereign of the London underground—was never part of the plan. He is a possessive tyrant who tolerates no chaos in his borough, yet he finds himself maddened by the feral American viper who answers to no king. From the dark alleys of Mayfair to the blood-stained neon penthouses of Miami and New York, a dangerous game of physical dominance and high-stakes white-collar war ignites. She wants vengeance; he wants absolute sovereignty over her heart. In a world built on lies and iron rules, will they destroy each other, or build an unbreakable empire together across the Atlantic?