<p>A mesmerising, award-winning, daringly imaginative, multi-levelled thriller for fans of John le Carre or Neal Stephenson<br><br><br><br>An ultra-secret MI6 codename. A deadly game of deception and intrigue. Dark forces from the depths of history. The terrible secret at the heart of the cold war.<br><br><br><br>Operation: DECLARE<br><br><br><br>London, 1963. A cryptic phone call forces ex-MI6 agent Andrew Hale to confront the nightmare that has...