Deb Green

A former mob enforcer who is released from prison after serving 22 years for a crime he didn't commit sets out on a path for revenge against the people who wronged him.

A reformed sociopath heads to a remote island after the death of his brother. Soon after his arrival, the island falls under siege from a deadly gang of mercenaries, and when he discovers their role in his brother’s demise, he sets out on a relentless quest for vengeance.