Phantom Debt (en Inglés) - Rupert Groom

Cole Maddox repairs watches for a living. He keeps odd hours, speaks in few words, and makes very good tea. The people of Edinburgh's Grassmarket think he's quiet. They're not wrong - he's just quiet for reasons they'd rather not know.

When a criminal syndicate marks his goddaughter for death to protect a nine-hundred-million-dollar money laundering empire, Cole puts down his tweezers and picks up everything else. What follows takes him from the closes of Edinburgh to the server farms of Geneva to the glass towers of Vienna - and forces him to become, one last time, the man he buried six years ago.

Phantom Debt is a lean, propulsive thriller in the tradition of John Wick and the Jason Bourne novels - a story about how far a man will go for the people he loves, and whether the quiet life he built can survive the man he had to be to save it.