He has written several nonfiction books, including The Joy, an account of life in Mountjoy Prison, The Gaffers: Mick McCarthy, Roy Keane and the Team they Built, an account of the McCarthy–Keane clash during the run-up to the 2002 World Cup. He also co-authored Steve Collins' "autobiography", Celtic Warrior.Librarian Note: There is more than one author in the Goodreads database with this name.