Master of the spy thriller, Le Carré’s new book compounds his own legacy of publishing at a pitch for six decades. Peter Guillam is an old, long-retired spy who receives an unwelcome summons to answer questions surrounding a treachery in Berlin during the Cold War. The details are built on the backstory of The Spy Who Came in From the Cold, and involve an agent who had a son with a German woman. The son, now vengeful, is threatening to expose the British Secret Service. Guillam’s actions and sacrifices are now questioned by a new breed of secret service officials who are frustratingly cavalier about the past and the codes of honour that determined Guillam’s own ethics. He must delve into the past records to find the truth behind the affair – and this is held tantalisingly out of reach until the end. Le Carré remains a writer capable of lifting this genre of thriller to another calibre. Beautifully plotted; infinitely twisty – superb!