John Lawton: Friends and Traitors [2018] trade paperback

It is 1958. Chief Superintendent Frederick Troy of Scotland Yard, newly promoted after good service during Nikita Khrushchev's visit to Britain, is not looking forward to a Continental trip with his older brother, Rod. Rod was too vain to celebrate being fifty so instead takes his entire family on 'the Grand Tour' for his fifty-first birthday: Paris, Sienna, Florence, Vienna, Amsterdam. Restaurants, galleries and concert halls. But Frederick Troy never gets to Amsterdam. After a concert in Vienna he is approached by an old friend whom he has not seen for years - Guy Burgess, a spy for the Soviets, who says something extraordinary: 'I want to come home.' Troy dumps the problem on MI5 who send an agent to de-brief Burgess - but the man is gunned down only yards from the embassy, and after that, the whole plan unravels with alarming speed and Troy finds himself a suspect. As he fights to prove his innocence, Troy finds that Burgess is not the only ghost who returns to haunt him.