Sierra Six - Mark Greaney

A TERRORIST BACK FROM THE DEAD. A DEBT TO BE PAID.

Before he was the Gray Man, Court Gentry was Sierra Six, the junior member of a CIA action team.

In their first mission they took out a terrorist leader, but at a terrible price - the life of a woman Court cared for. Years have passed and now The Gray Man is on a simple mission when he sees a ghost: the long-dead terrorist, but he's remarkably energetic for a dead man.

A decade may have gone by but the Gray Man hasn't changed. He isn't one to leave a job unfinished or a blood debt unpaid.

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'I love the Gray Man'
Lee Child

'So propulsive, the murders so explosive, that flipping the pages feels like playing the ultimate videogame'
New York Times