Well these are not coffee table books, but are up excellent reads:
Bandit country "The IRA and South Armagh" by Toby Harden, its slightly of date 11years old, but its an excellent read and fair zips along.
The Provos: The IRA and Sinn Fein by Peter Tayor,An excellent history of the modern IRA,most of Peter Taylors books seem to have decent reviews.
Hope this helps?
Regards Steve.