Uncover the thrilling, unseen battles of the interwar years. Explore Britain’s secret war within MI5 during the volatile 1920s and 1930s. This essential history delves into the espionage and counter-subversion tactics that shaped British intelligence on the eve of global conflict. Discover the foundational methods of modern spycraft, a must-read for Indian students and enthusiasts of military history, intelligence operations, and clandestine warfare.