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).
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 Ó Conchubhair) DrámaÃocht na Gaeilge: An Chanóin? Forthcoming from Cló Iar-Chonnachta, 2018.