Traitor - Andy McNab

Danny Watts' grandfather, Fergus, was a Deniable Operator in the SAS before he was betrayed, imprisoned, and falsely denounced as a traitor. Now Fergus has escaped, but the real traitor is determined to silence Fergus and Danny for good. Together Danny and Fergus are forced to go on the run in an against-the-odds battle for survival. As they try to clear Fergus' name, Danny learns all the military field craft, trade skills, and covert operations techniques that are second nature to his grandfather. When Fergus is recaptured, Danny must put those skills to the test and rescue Fergus before it's too late.