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BOOK SALES
To purchase, please see the links, below.
NEW! Bletchley Park Codebreakers: in their own words (Greenhill Books) Published October 2022.
Alastair Denniston: Code-breaking from Room 40 to Berkeley Street and the Birth of GCHQ (Frontline Books) Published September 2017.
Gordon Welchman: Bletchley Park's Architect of Ultra Intelligence (Frontline Books) Published October 2013.
The Turing Guide, Chapter 10, The Enigma Machine (OUP)
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