'A rollicking read for all those who enjoy a spy story so fanciful that Ian Fleming - himself an officer in Montagu's wartime department - would never have dared to invent it'

Max Hastings, Sunday Times

'Ben Macintyre, also the author of the acclaimed Agent Zigzag, is fast becoming a one-man industry in these updated tales of cunning, bravery and skulduggery. With his mix of meticulous research and a good hack's eye for narrative, it is hard to think of a better guide to keep beckoning us back to that fascinating world'

Observer

'Even more spellbinding than his previous story of wartime espionage, Agent Zigzag, with a cast-list every bit as dotty and colourful ... Macintyre is a master of the thumbnail character sketch'

Mail on Sunday

'Astonishing ... sheds riveting new light on this breathtaking plan'

Daily Mail