Early in 1998, Ó Muraíle was approached by fellow Mayoman, Éamonn de Búrca, with an offer to publish his edition of "Leabhar na nGenealach". De Burca insisted on a full translation of the text into English (with the original Irish text on the facing page) in opposition to Ó Muraíle's wish to publish with Irish text only. De Búrca prevailed, and the book, titled "The Great Book of Irish Genealogies", was published in five volumes (vols. IV and V consisting of indices alone) in 2004, with 3,100 pages in a full buckram gilt presentation box. It remains Ó Muraíle's unique contribution to Irish scholarship.