All families have secrets. But Alistair Wood's family have more than most. . He grew up within the four (very high) walls of SIS's specialist training camp, surrounded by the most senior and colourful characters in the Service's history. His mother was one of only a handful of female agents to have operated behind enemy lines in Berlin. And his father, an ostensibly heroic humanitarian who died 'in the field' in Bosnia at 82, had in fact led a highly secret double life since his summary (and still classified) expulsion from the Service forty years earlier...