Mark Greaney’s Gray Man series, about Courtland Gentry, renegade former CIA assassin, continues with Sierra Six, which combines a contemporary story with flashbacks to his first assignment, twelve years ago, as part of a CIA kill team. The two threads intertwine, more and more tightly as the story goes on, coming finally to a crashing double point.

We start with the flashback, where young Court’s talents as a fighting man are recognized, and the CIA decides to add him to an action team. He’ll be the “Six,” the point man, replacing a string of other sixes who’ve been killed on recent missions. Court is not a team player by nature – it’s hard for him to coordinate with others. Even harder for him to trust others. In training, he keeps messing up. In early missions, he makes costly mistakes. But his sheer talent persuades his superiors to keep him on the team – though his team members don’t like him one bit.

In the present, working as a freelance, he gets hired for an operation in Algiers. In the course of the action he glimpses the face of a man he thought was dead – a terrorist he came up against on that old, first mission. Court has a personal score to settle with that man. And, incidentally, that man is going to murder millions of people if he isn’t stopped.

Sierra Six was a tight, taut thriller that never let up. The action was pretty cinematic – a little implausible, but compelling. I don’t have the tolerance for such stories that I used to have, but I can’t deny it was well done. And I do keep reading the books.

Recommended, for those who like this kind of story. Cautions for what you’d expect.