Old Flames — John Lawton

Scotland Yard's Inspector Troy returns in a Cold War spy thriller hailed as “stylish, sophisticated, suspenseful . . . A fictional tour de force” (Patrick Anderson, The Washington Post).
 
In April 1956, at the height of the Cold War, Khrushchev and Bulganin, leaders of the Soviet Union, are in Britain on an official visit. Chief Inspector Troy of Scotland Yard is assigned to be Khrushchev's bodyguard and to spy on him. Soon after, a Royal Navy diver is found dead and mutilated beyond recognition in Portsmouth Harbor. Troy embarks on an investigation that takes him to the rotten heart of MI6, to the distant days of his childhood, and into the dangerous arms of an old flame.
 
“If Troy is the character at the heart of this novel, its soul is England as it was during the Cold War years, a country fueled by paranoia and espionage, overrun with agents and counter-agents, caught up, as Troy says, in ‘an age that specialized in thinking the unthinkable.'” -- Anne Stephenson, USA Today