To murder an SAS man is no easy task. So when three former Regiment guys turn up dead, brutally butchered in different corners of the globe, the hunt is on for a pro.

But sometimes it takes a killer to catch a killer.

Enter Danny Black.

When the Regiment legend learns that his prime suspect is a top MI6 agent, highly trained in the SAS's dark arts and currently operating deep under cover, he knows that this will be no ordinary mission. It will be a black op of the highest secrecy and utmost urgency. A black op Hereford will only entrust to Danny.

With the help of the target's impressive female MI6 handler, and accompanied by a grizzled bunch of former special forces operatives, the trail will take him across the world: from Hereford to London to the Brecon Beacons, and from the bright lights of Beirut to the badlands of the Syrian desert.

But there is more to this mission than Danny can ever know, and in the secret world, sometimes your deadliest enemy is much, much closer to home.

In the secret world, the hunter can quickly become the hunted.

As the tracer rounds fly and the body count rises, could it be that Danny Black has finally met his match?