Efrem is older, brutal, and the most dangerous man in New York. And he's the man I want.

My family's expectations are clear. With the election for governor of New York looming and my father's political aspirations shining brighter than ever, all eyes are also on me, his daughter.

There are rules in our world. Conventions. Things that a girl like me just doesn't do–like falling for six-foot-three inches of handsome, ruthless Bratva muscle.

Efrem is from a different world–one that I have no place in. I know where my loyalties should lie, when it comes to the choice between duty or desire.

Efrem is a dangerous man. A killer. A sinner.

But this sinner is my obsession–and I want to be his.

Sinner's Obsession is the first installment of the Vow of Sin series. The reading order is as follows: Sinner's Obsession, Sinner's Vow, and Sinner's Revenge. The series is complete!