Death Comes But Once. Decker's War, #1

Zack Decker wanted one thing: to fight as a Marine Pathfinder. He got it. Then he lost it. Temper. Hatred of brass. Career over. Wife gone. Friends gone. Nothing left but a bottle and a string of planets he barely remembered. Then an old Marine buddy pulled him out of the gutter. Offered him a job. Decker took it. He was already running-cop dead, militia hunting him. No place to hide. The job was dirty.
Security on a starship with owners who stank of trouble and a crew just as bad. Work that made a mockery of Once a Marine, always a Marine. Curiosity almost killed him next. He dug too deep. Found a secret big enough to burn the Commonwealth to ash. Now the hunters were closing in-shadows, killers with orders. The kind who don't stop. They thought he was finished. Washed-up. Broken. They forgot he could still fight like one of the Few.
And he was ready to remind them.