Her Obsession.

He kills without mercy. She loves without reason. And nothing will stop her from having him.
For three years, Mafia leader Conner O’Neill has felt eyes on him. A phantom touch in the night. Perfume lingering on his pillows. Warm cookies in his oven. Enemies' heads delivered to his doorstep, gift-wrapped in bloodied silk. It isn’t fear that coils in his gut—it’s fascination. Someone is watching him. Someone who knows him. Someone who kills for him.
Her name is Sage—and she’s been his shadow since the night he unknowingly stole her heart with a bullet to another man’s brain. For her, it was love at first sight. Violent. Beautiful. Inevitable. Raised in darkness, owned by a monster, Sage was never meant to love. But Conner changed that. And she’s been his ever since, waiting for the day she can step out of the shadows and into his arms.
But the man who owns her doesn’t let go of his toys. And the man she loves doesn’t know she exists—yet.
She’s done watching. It’s time he learns the truth.
He belongs to her. And she’ll kill anyone who tries to take him away.