The Janson Directive was written way back in 2002. Quite why just on 10 years a new series is brought about, quite why is a mystery.
The books are in some ways a simpler version of Jason Bourne, a spy and super fit hero that only works for morally correct organisations, although usually by the end of the book they prove otherwise.
I can't say that this is a Ludlum book, as so long after his death it seems unlikely that he would have a whole series of books outlined. They are quite readable, but not up to the true Robert Ludlum novel.