Collected Poems, 1950-73 (Dublin, New Writers Press, 1973);
Reductionist Poem (Dublin, Raven Arts Press, 1980);
41 Sonnet Poems (Raven Arts Press, 1982);
RMS Titanic (Raven Arts Press, 1981);
New and Selected Poems (Raven Arts Press/Manchester, Carcanet, 1982);
The End of the Modern World (1989);
Relationships (Dublin, New Island Press, 1992); and
Minotaur (New Island Books, 1999).
Novels:
The Life of Riley (Knopf, 1964).
Literary Criticism:
No Laughing Matter: The Life and Times of Flann O'Brien. New Island Books, 2003. ISBN 1-904301-37-1
Memoirs:
Dead as Doornails (Dublin, Dolmen Press, 1976)
Essay on Patrick Swift:Veronica Jane O’Mara (ed.), PS...of course- Patrick Swift 1927-83, with contributions on Swift by George Barker, Anthony Cronin, Patrick Kavanagh, John McGahern, John Ryan , C. H. Sisson, Katherine Swift, David Wright(Gandon Editions, Kinsale, 1993)
Biography:
Samuel Beckett: The Last Modernist (HarperCollins, 1996)