Former spy Gabriel Allon is about to face his greatest ever challenge . . . When an al-Qaeda suspect is killed in London, photographs on his computer lead Israeli intelligence to suspect that al-Qaeda is planning its most audacious attack so far. To Allon, there is something terribly familiar about the information, something horrifyingly close - but even he does not realize how close. Urgently, he throws himself into the hunt, but there may simply not be enough of anything: enough time, enough facts, enough luck. An extraordinary enemy walks in the shadows . . . and he's just getting started.