Their operations are deniable. Their skill is deadly. SAS hero Danny Black is recruited to an assassination squad directed to hunt down and kill terrorist cells in a gripping thriller from the man who knows what it's like at the front line.

The suicide bomb strikes central London. The trail leads first to a hate cleric in a North London mosque, and his connections to a devout Saudi prince with a taste for hookers, drugs and booze.

But it's only when Danny tracks down his target to a training camp in the Yemen that he finds there may be a connection a hell of a lot closer to home.