Efrem's death destroyed me. Now all I live for is our secret child.

The love of my life was killed by a man I despise: Mikhail Sidorov—the same man I married to protect Efrem's unborn son.

For years, my vindictive husband has used my son to torment me. To make me complicit in his sordid Bratva affairs.

But when I discover Efrem is alive, everything changes.

Mikhail has kept him prisoner just floors below me all this time.

Until now.

I want to run away with Efrem. To take our son and flee. But I know better than to believe we'll make it out alive.

And after everything Mikhail has done, Efrem won't let him go scot-free.

But Efrem's thirst for retribution might just cost me everything I've paid so dearly to protect.

They say revenge is a dish best served cold, but this sinner's revenge will be as cold as ice.
Sinner's Revenge is the final book in the Vow of Sin series. The series is complete. The reading order is as follows: Sinner's Obsession, Sinner's Vow, Sinner's Revenge.