Alastair Denniston. Code-breaking From Room 40 to Berkeley Street and the Birth of GCHQ, Paperback/Joel Greenberg

A ground-breaking biography of the man who led Britain's code-breaking efforts in both world wars. Publisher: Pen & Sword Books Ltd Author(s): Joel Greenberg Number of pages: 336 Publication date: 2022 Dimensions: 156 x 234 x 32 Cover type: Paperback / softback