Martin Dillon is a great read for anyone interested in the "troubles". He has writen a number of books (including the one that Wolfgang has linked to) such as God and the Gun, the Shankill Butchers, Trigger Men, Rogue Warrior of the SAS: The Blair Mayne Legend, Stone Cold: The True Story of Michael Stone and the Milltown Massacre and Twenty-Five Years of Terror: The IRA's War Against the British.