Still with marathons, this fast-and-furious spy thriller, which picks up more or less where Le Carré left off, starts with a suicide bomber in the London marathon bent on blowing up thousands of runners, including the US ambassador, when they reach Tower Bridge. MI6's chief mole-catcher George Smiley has been replaced by Marcus Fielding, nicknamed The Vicar, engaged in exactly the same turf wars as MI5 and the CIA in Smiley's People. And, like Jason Bourne, Daniel Marchant is a spook on the run. Like Bourne, too, he's the hero of a trilogy about to become a Hollywood movie. For once, audio has beaten the field - the hardback isn't due out until July.