Dwyer, T. Ryle. Michael Collins: The Man Who Won the War. Chester Springs, PA: Dufour Editions, 1992.
Surveillant 2.5: "According to Dwyer, Collins coordinated the sweeping Sinn Fein election victory in 1918, organized the IRA, and set up the first Irish intelligence network."
Dwyer, T. Ryle. "The Squad" and the Intelligence Operations of Michael Collins. Cork and Dublin: Mercier Press, 2005.
Foy, Michael T. Michael Collins's Intelligence War: The Struggle between the British and the IRA 1919-1921. Stroud, UK: Sutton, 2006.
From publisher: "Michael Foy's new book looks in depth at Collins's key role in the Anglo-Irish War of 1919-20, and explores the role and personality of this fascinating man."
According to John Burns, Sunday Times (London), 2 Apr. 2006, the author suggests that Molly Childers, the American wife of Erskine Childers, "spied on Sinn Fein for the British government.... He bases the controversial claim in part on an analysis of the agents reports, which included American-sounding turns of phrase."
Gleeson, James. Bloody Sunday: How Michael Collins' Agents Assassinated Britain's Secret Service in Dublin on November 21, 1920. Guilford, CT: Lyons, 2004.
Hopkinson, I&NS 21.4 (Aug. 2006), notes that this book was originally published in 1962 and that the only change "is the inclusion of an enthusiastic and completely uncritical introduction by Dermot McEvoy which reveals no awareness of the enormous developments in knowledge and understanding of the Irish revolutionary period in the last four decades." Nevertheless, Glesson understood just how much "the war was an intelligence conflict" and saw "the events of Bloody Sunday as the critical mement in the intelligence war."
Hartline, Martin C. "Michael Collins and Bloody Sunday." Studies in Intelligence 13, no. 1 (Winter 1969): 69-78.
The eventual success of the Irish nationalists "constitutes a classic example of the effectiveness of unconventional warfare in forcing a powerful adversary to the negotiating table. [footnote omitted] The Irish intelligence service was one of the architects of the victory. The Director of Intelligence of the Irish Republican Army during the last act of the drama was Michael Collins."
Murphy, John F., Jr. "Michael Collins and the Craft of Intelligence." International Journal of Intelligence and Counterintelligence 17, no. 2 (Summer 2004): 333-357.
The author offers a quick overview of the Irish revolutionary tradition, and fits Collins' "invisible army" into the drive for independence. November 1920's "Bloody Sunday" showed that "Collins had succeeded in penetrating the most sensitive British intelligence operation and destroying it."
Neligan, David. The Spy in the Castle. London, MacGibbon & Kee, 1968. Irish Books & Media, 1999.
The author was one of Michael Collinss agents in G Division of the Dublin Metropolitan Police, based in Dublin Castle, the headquarters of British intelligence in Ireland until 1922.
O'Halpin, Eunan. "Collins and Intelligence 1919-1923 : From Brotherhood to Bureaucracy." In Michael Collins and the Making of the Irish State, eds. Gabriel Doherty and Dermot Keogh, 68-80. Cork: Mercier Press, 1998.
Ryan, Meda. Michael Collins and the Women Who Spied for Ireland. Dublin: Mercier Press, 2006.
Stewart, Anthony Terence Quincey. Michael Collins: The Secret File. Belfast: Blackstaff, 1997.
Facsimile of all the main documents in the RIC's secret file on Collins (1916-1920), released in the PRO, London.
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