'Has demonstrably managed to open the usually vice-like jaws of many former Security Service staff'

Duncan Campbell, New Statesman

'The most accurate and informative history of the British Security Service yet published'

New Society

Like a second Chapman Pincher, he has set the cat among MI5's pigeons'

The Times

'Will be an eye-opener'

The Observer

A notebook filled with Abwehr transmitting instructions.