Her research and teaching focus on modernist and contemporary literature from Ireland, Britain, and Oceania.
[7] Long has also written about the effect of climate change on sea level rise, particularly as it affects South Pacific island nations.
[10][11] Long is an expert on the Irish novelist and playwright Flann O'Brien and has published two award winning books on him.
Joseph Booker called The Collected Letters of Flann O'Brien, "a major event in the documentation of modern Ireland's history.
"[14] The Irish Studies Review said, "Reading Maebh Long's recent book, Assembling Flann O'Brien, one cannot help thinking that the poor fellow is finally getting the attention he deserves.