Books
(1) Explaining Irish Democracy (UCD Press, Dublin, 2002).
(2) The Politics of the Irish Civil War (Oxford University Press, Oxford, 2005).
(3) New Beginnings: Constitutionalism and Democracy in Modern Ireland ( UCD Press, Dublin 2011).
(4) Reconstructing National Identity after Europe’s Internal Wars 1917-2011 Ed. (forthcoming Pennsylvania University Press, 2014).
(5) Civil War: the Contemporary Challenge (forthcoming Oxford University Press, Oxford, 2014).