| Theatre and Globalization: irish drama in the celtic tiger era P Lonergan Palgrave, 2009 | 211 | 2009 |
| The Lieutenant of Inishmore M McDonagh Bloomsbury Publishing, 2014 | 113 | 2014 |
| Theatre and social media P Lonergan Bloomsbury Publishing, 2015 | 81 | 2015 |
| The theatre and films of Martin McDonagh P Lonergan A&C Black, 2014 | 80 | 2014 |
| " The laughter will come of itself. The tears are inevitable": Martin McDonagh, globalization, and Irish theatre criticism P Lonergan Modern Drama 47 (4), 636-658, 2004 | 44 | 2004 |
| The Lonesome West M McDonagh A&C Black, 2010 | 32 | 2010 |
| Too Dangerous to Be Done? Martin McDonagh's Lieutenant of Inishmore P Lonergan Irish Studies Review 13 (1), 65-78, 2005 | 32 | 2005 |
| Irish Drama and Theatre Since 1950 P Lonergan Bloomsbury Publishing, 2019 | 30 | 2019 |
| The Representation of Phineas Finn: Anthony Trollope's Palliser Series and Victorian Ireland P Lonergan Victorian Literature and Culture 32 (1), 147-158, 2004 | 13 | 2004 |
| ‘A Twisted, Looping Form’ Staging dark ecologies in Ella Hickson’s Oil P Lonergan Performance Research 25 (2), 38-44, 2020 | 11 | 2020 |
| Echoes Down the Corridor P Lonergan, R O'Dwyer Peter Lang, 2007 | 11 | 2007 |
| “The Lost and the Lonely”: Crisis in Three Plays by Enda Walsh P Lonergan Études irlandaises, 137-154, 2015 | 10 | 2015 |
| Contemporary Irish Plays: Freefall; Forgotten; Drum Belly; Planet Belfast; Desolate Heaven; The Boys of Foley Street M West, P Kinevane, R Dormer, R Jenkinson, AN Riain, L Lowe Bloomsbury Publishing, 2015 | 10 | 2015 |
| JM Synge, authenticity, and the regional P Lonergan Regional Modernisms, 2013 | 10 | 2013 |
| Irish Drama: Local and Global Perspectives N Grene, P Lonergan Peter Lang Limited, International Academic Publishers, 2019 | 9 | 2019 |
| The Gate Theatre, Dublin: Inspiration and Craft D Clare, D Lally, P Lonergan Peter Lang AG, 2018 | 8 | 2018 |
| Irish Short Fiction: 1880–1945 P Lonergan A Companion to the British and Irish Short Story, 51-64, 2008 | 8 | 2008 |
| ‘Never Mind the Shamrocks’: Globalizing Martin McDonagh P Lonergan Martin McDonagh: A Casebook, 2007.149-177, 2007 | 7 | 2007 |
| Seven Steps to Martin McDonagh P Lonergan Irishtimes. com. Irish Times 6, 2012 | 5 | 2012 |
| Irish Theatre and Globalisation: A Faustian Pact? P Lonergan Cultural Perspectives on Globalisation and Ireland. Frankfurt am Main: Peter …, 2011 | 5 | 2011 |