Silencer - Andy McNab

Nick Stone has always kept his job as ex-SAS trouble shooter at arms' length from his home life.
But when his son falls dangerously ill and the doctor who saves him comes under threat from an old adversary, it is no longer possible. Life just got very personal.

To stop his cover being terminally blown, he must follow a trail that begins in Triad-controlled Hong Kong. He is propelled back into the brutal world he thought he'd left behind. The forces ranged against him have guns, helicopters, private armies and a terrified population in their vice-like grip. Nick Stone has two decades of operational skills - but this time, that may not be enough