He watches from the shadows. He protects like a king. And once he claims her... he never lets go.

Calla Hart is just trying to survive-late nights, low tips, unpaid tuition, and a city that doesn't care whether she makes it home safe. What she doesn't know is that someone has already noticed her routine, memorized her weaknesses, and decided she's under his protection.

Lucian Cross doesn't observe out of curiosity. He studies threats. He controls outcomes. And when danger circles, he eliminates it.

As violence creeps closer and secrets surface in the neon dark, Calla is pulled into a world where power watches, obsession guards, and desire is as dangerous as the enemies closing in.

Billionaire King of Obsession is a dark, slow-burn billionaire romantic suspense packed with psychological tension, protective dominance, high-stakes danger, and a love story that proves obsession can be both terrifying-and irresistible.