An Underground Theatre: Major Playwrights in the Irish Language, 1900-1980 forthcoming from University College Dublin Press.
Writing beyond the Revival: Facing the Future in Gaelic Prose, 1940-1951, (Dublin: University College Dublin Press, 2011).
Irish Interior: Keeping Faith with the Past in Gaelic Prose, 1940-1951 (Dublin: University College Dublin Press, 2010).
Gaelic Prose in the Irish Free State, 1922-1939 (Dublin: University College Dublin Press, 2004) Winner, 2005 Michael Durkan Prize from the American Conference for Irish Studies).
D茅irc an D贸chais: L茅amh ar Shaothar Ph谩dhraic 脫ig U铆 Chonaire (Indreabh谩n: Cl贸 Iar-Chonnachta, 1995).
Ideology and Innovation: The Prose Literature of the Gaelic Revival, 1881-1921 (State College: Penn State Press, 1994) Winner, 1995 Donald Murphy Prize from the American Conference for Irish Studies; Nominee, 1995 Irish Times prize for non-fiction.
Books (edited)
(with Brian 脫 Conchubhair) Dr谩ma铆ocht na Gaeilge: An Chan贸in? Forthcoming from Cl贸 Iar-Chonnachta, 2018.
(with Brian 脫 Conchubhair) 脷rsc茅alta Gaeilge an Fichi煤 hAois: Can贸in Liteartha? Forthcoming from Cl贸 Iar-Chonnachta, 2017.
Queen of the Hearth by Father Patrick Dinneen (An tAthair P谩draig 脫 Duinn铆n) Dublin: University College Dublin Press, 2013).
(with Margaret Kelleher) The Cambridge History of Irish Literature, vol. 1: To 1890. (Cambridge: Cambridge University Press, 2006).
_____, The Cambridge History of Irish Literature, vol. II: 1890-2000. (Cambridge: Cambridge University Press, 2006).
聽脡ire-Ireland (Spring-Summer, 2000), special issue on translation.