Tom Clancy Oath of Office by Marc Cameron The fall of the Iranian government presents unexpected danger to President Jack Ryan in the latest entry in the #1 New York Times bestselling Tom Clancy series. President Jack Ryan preaches caution when the prospects for a Persian Spring excite the rest of the world. His is the lone Western voice urging watchfulness. As he says, "Sometimes it's better to have all the bad guys all in one place where you can keep an eye on them rather than scattered around the Middle East." Meanwhile the Campus has been trailing a major international arms dealer whose business has waxed as the power of the Ayatollah has waned. Now, the change of regimes in Iran has opened up formerly unimagined possibilities to him. Possibilities which may lead to a new balance of power in the region.