Mi5 and Ireland, 1939-1945: The Official History

The book reveals a comprehensive account of MI5's Irish section BIH, detailing its formation and operations post-World War II. It highlights the collaboration with Irish army intelligence and sheds light on German espionage in Ireland during the war. Additionally, it explores the broader counterintelligence and codebreaking efforts of British agencies against Axis threats via neutral Ireland. The text also offers insights into the organization of British intelligence across Ireland and candid evaluations of Irish security strategies and key figures of the time.