<p><b>Gabriel Allon brought down the most dangerous man in the world. But he made one mistake. Leaving him alive . . .</b><br><b><br>''Kept me on the edge of my seat until the last page'' </b>5***** Reader Review<br><b>''A heart-stopping thriller which you can''t put down until you''re finished'' </b>5***** Reader Review<br>________<br><br>Spy turned art restorer Gabriel Allon is trying to resume his honeymoon in the secluded hills of Umbria with his new wife, Chiara, when shocking news reaches him from London.<br><br>The defector and former Russian intelligence officer, who saved Gabriel''s life in Moscow Rules, has vanished without a trace. British intelligence suspect the defector was always a double agent, but Gabriel is convinced otherwise.<br><br>Gabriel and his team find themselves in a deadly duel of nerve and wits with one of the world''s most ruthless men: the murderous Russian oligarch and arms dealer Ivan Kharkov.<br><br>It will take Gabriel from a quiet mews in London to t