I find that I enjoy each book in the series on Sean Falcone more than the last, and I am looking forward to the sequel to be published this summer. Since it appears to be picking up where Collision left off, it may resolve what has been my main complaint, that the stories seem to take a very long time to build up and then are resolved so quickly at the end. I do have one minor quibble with Collision: Who did the editing? There were at least four typos, and typos, distracting as they are, are non-negotiables when reading political thrillers.
I enjoy the author's veiled references to current movers and shakers (their initials, positions, etc), and it goes without saying, his many years in Washington lend credibility to his writing.