David Kahn - already acknowledged as an expert historian of Intelligence in the Second World War after his earlier books The Codebreakers and Hitlers Spies - focuses here on the key struggle to win the Battle of Atlantic. The Royal Navy and the RAF played vital roles, of course, in protecting Allied shipping from Nazi submarines and in capturing secret documents and cipher machines, but the real Intelligence battle was fought, and won, at Bletchley Park in rural England where a growing band of eccentrics struggled and finally broke the secret German codes. The size of the whole operation became staggering, but without it Britain's supply lines would have been cut and Germany would have been able to invade, or sue for peace. SEIZING THE ENIGMA is brilliantly researched and written. It is a fitting account and tribute of one of the key struggles of WWII.