PositiveThe Spectator...[a] well-researched and readable account ... Blake’s story has been told before, as has the [Berlin] tunnel’s, but Steve Vogel pulls them together accessibly and comprehensibly, along with the wider political context and entertaining detail about personalities of the period (Khrushchev blundering into Lady Eden’s room at Chequers, for example). He also answers the key question: why did the KGB allow the tunnel to operate for so long before ‘discovering’ and closing it? ... Vogel convincingly refutes any suggestion that the tunnel was manipulated by the Russians to provide disinformation. The Cold War is a huge story, of which this was a small part; but it was crucial in its time and this is a very good account of it.