King's Promise. Volkov Bratva Series, #1

I never wanted the crown of the Volkov Bratva. But it was never mine to reject. When my father died, I inherited more than his empire-I inherited his final command:Marry the daughter of his oldest friend. Anya Petrov. She was the girl I couldn't forget. Now she's the woman I'm forced to protect... and possess. This isn't a love story. It's a survival pact wrapped in silk and sealed in blood. She doesn't want me.
She thinks I'm cruel. But I know how to rule-and how to take what's mine. There's a mole in the organization. Enemies at our gates. A war is brewing in the shadows of London. If I lose her, I lose everything. And I don't lose. I was forged in frost. Crowned in violence. And she... she's my promise. Even if I have to burn the world down to keep her.