This is a good book about the rise and eventual defeat of Northern Ireland's main Loyalist (Prodestant) terror groups.
The book details the two main groups, the UDA (Ulster Defense Association) and the UVF (Ulster Volunteer Force). Both groups originated in the 1970's (Although the UVF has historical roots dating back to the Anglo/Irish war) and were responsible for hundreds of innocent deaths in Northern Ireland from 1970 to this day.
According to the book, the UDA and UVF were weakened during the 1970's by a campaign of assassination launched against them by the IRA and INLA. During the late 1980's and early 90's, both the UDA and UVF became highly active again. The book speculates (as many others have) that the resurgence was due to training, arms and information from the British Army and MI5, both of whom had been unable to achieve any lasting success against the IRA. The British hoped to use both terror groups as proxies against the IRA, but the IRA renewed it's assassination campaign against both organizations resulting in at least 50 high ranking UDA/UVF leaders being killed throughout the 80's and 90's. It is believed that this assassination campaign convinced the UDA and UVF to follow the IRA in dclaring ceasefires in 1994. Overall this is a highly informative and well written book about the savagery and eventual failure of the Loyalist terror groups.