The Target

The Target by David Baldacci

Their last mission was deemed successful and they even received some awards for it, but it left Will Robie and Jessica Reel with some pretty powerful enemies. When the President finds himself faced with a potential crisis in North Korea and needs the best assassins America has to offer, he turns to Robie and Reel to get the job done.

I've read David Baldacci before and really enjoyed his books, this one was a little over the top in credibility but still worth the read.