Zones of Silence

A key member of the SIS's elite Operation Highflyer has vanished in Czechoslovakia. Eighteen months later he reappears in neutral Vienna, requesting political asylum and denying all knowledge of his past. Yet he holds the key to treason that could wreck the British security establishment. 

Sent unofficially to Vienna to investigate, John Morpurgo, the outsider with more enemies than friends in the corridors of power, finds himself at the centre of an unparalleled power struggle between the heads of Five, Six, their American ‘Cousins’ of the CIA and the shadowy men at Moscow Centre...