I've just finished reading several David Baldacci books, all of which I enjoyed immensly. They were: Split Second, Hour Game, Simple Genius, The Camel Club and The Collectors. The first three involve the same two main characters and the second two involve four main characters. They are all what I call mystery adventure books. I've read nearly all of his other books and am awaiting his newest Stone Cold which looks to be the third book in the series involving the four main characters. In the mean time I have been reading The Prometheus Deception by Robert Ludlum (author of The Bourne Identity and many others), also a very good book and in the same genre as Baldacci.