Loved it, loved it, loved it. PB and I listed to this one on audiobook - one of the best I've heard so far. It's written by a former war correspondent who uses his experiences in journalism to add rich detail to the novel.
It's the story of Michael, an on-again, off-again CIA agent whose married to the doctor of a liberal senator. The story centers around Michael's showdown with a deadly former-KGB, now killer for hire code named October. October tried to kill Michael and his wife but instead killed his partner and Michael's wife, Elizabeth killed October's lover and partner.
October works for a super secret society made up of the heads of various state intelligence units and big arms dealers. The essential idea is that they involve themselves in efforts to crush the Ireland peace accords in order to encourage violence, and therefore the need for weapons and state security worldwide.
I actually didn't know much about the Irish conflict before I listened to this book. I would definitely read more of his stuff.