John McColgan earned a Ph.D. in Modern Irish History and a Diploma in Archival Studies from the National University of Ireland. He has contributed to various journals including Irish Historical Studies, Administration and Irish Archives Bulletin.
Reviews of the first publication: ‘This is an important, original and illuminating contribution to the fledgling history of the Irish administration.’ — Kieran Flanagan, Irish Historical Studies, Volume 24, Issue 95 ‘… McColgan's book is an original, scrupulous, often engrossing contribution to the study of Irish disorganization.’ — David Fitzpatrick, Irish Economic and Social History, Vol. 11