Ultimately, Clear and Present Danger is about good conscience, law, and politics, with Jack Ryan and CIA agent John Clark as its dual heroes. Ryan relentlessly pursues what he knows is right and legal, even if it means confronting the president of the United States. Clark is the perfect soldier, but a man who finally holds his men higher than the orders of any careless commander. Along with the usual, stunning array of military hardware and the latest techno-gadgets, Clear and Present Danger further develops the relationships and characters that Clancy fans have grown to love. Admiral James Greer passes the CIA torch to his pupil, Ryan. Mr. Clark and Chavez meet for the first time. Other recurring characters like Robert Ritter and "the President" add continuity to Clancy's believable, alternate reality. This is Clancy at his best.