'Dr Mohs's pioneering work deserves to act as an inspiration to other historians of the twentieth century.'

Prof. Christopher Andrew, University of Cambridge

'...a meticulously researched, highly scholarly and very well written academic study'
Andrew Roberts, Times Literary Supplement

'Dr Mohs's pioneering work deserves to act as an inspiration to other historians of the twentieth century.'
Christopher Andrew, University of Cambridge, UK

'A precedent setting book...a valuable contribution to the study of military intelligence'Hayden B. Peake, Studies in Intelligence

'...original and impressive.'Jeremy Wilson, authorised biographer of T. E. Lawrence

'...an expert contribution on the operational innovation and evolution of British intelligence practices during the First World War.'
Ryan Gingeras, Journal of Military History