Before Bletchley Park: The Codebreakers of the First World War (Hardcover)

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Before Bletchley Park: The Codebreakers of the First World War Cover Image


The story of Bletchley Park’s codebreaking operations in the Second World War is now well known, but its counterparts in the First World War—Room 40 & MI1(b)—remain in the shadows, despite their involvement in and influence on most of the major events of that war. From the First Battle of the Marne, the shelling of Scarborough, the battles of Jutland and the Somme in 1916, to the battles on the Western Front in 1918, the German naval mutiny and the Zimmermann Telegram, this cast of characters—several of them as eccentric as anyone from Bletchley Park in the Second World War—secretly guided the outcome of the "Great War" from the confines of a few smoke-filled rooms. Using hundreds of intercepted and decrypted German military, naval, and diplomatic messages, bestselling author Paul Gannon reveals the fascinating story of British codebreaking operations. By drawing on many newly discovered archival documents that challenge misleading stories about Room 40 & MI1(b), he reveals a sophisticated machine in operation.

About the Author

Paul Gannon is a science and technology writer. He is the author of the best-selling Colossus: Bletchley Park’s Greatest Secret (2006) and Trojan Horses and National Champions Crisis in Europe’s Computing and Telecommunications Industry (IT Book of the Year 1997).
Product Details
ISBN: 9780750992466
ISBN-10: 0750992468
Publisher: The History Press
Publication Date: September 1st, 2021
Pages: 352
Language: English