The #1 New York Times-bestselling series is back with the most shocking revelation of all. After years of facing international threats, President Jack Ryan learns that the greatest dangers always come from within...

It begins with a family dinner in Princeton, New Jersey. After months at sea, U.S. Navy Commander Scott Hagan, captain of the USS James Greer, is on leave when he is attacked by an armed man in a crowded restaurant. Hagan is shot, but he manages to fight off the attacker. Though severely wounded, the gunman reveals he is a Russian whose brother was killed when his submarine was destroyed by Commander Hagan's ship.

Hagan demands to know how the would-be assassin knew his exact location, but the man dies before he says more.

In the international arrivals section of Tehran's Imam Khomeini airport, a Canadian businessman puts his fingerprint on a reader while chatting pleasantly with the customs official. Seconds later he is shuffled off to interrogation. He is actually an American CIA operative who has made this trip into Iran more than a dozen times, but now the Iranians have his fingerprints and know who he is. He is now a prisoner of the Iranians.

As more deadly events involving American military and intelligence personnel follow, all over the globe, it becomes clear that there has been some kind of massive information breach and that a wide array of America's most dangerous enemies have made a weapon of the stolen data. With U.S. intelligence agencies potentially compromised, it's up to John Clark and the rest of The Campus to track the leak to its source.

Their investigation uncovers an unholy threat that has wormed its way into the heart of our nation. A danger that has set a clock ticking and can be stopped by only one man...President Jack Ryan.
About the Author: A little more than thirty years ago Tom Clancy was a Maryland insurance broker with a passion for naval history. Years before, he had been an English major at Baltimore's Loyola College and had always dreamed of writing a novel. His first effort, The Hunt for Red October, sold briskly as a result of rave reviews, then catapulted onto the New York Times bestseller list after President Reagan pronounced it "the perfect yarn." From that day forward, Clancy established himself as an undisputed master at blending exceptional realism and authenticity, intricate plotting, and razor-sharp suspense. He passed away in October 2013.

Mark Greaney has a degree in international relations and political science. He is the author of the New York Times bestsellers Tom Clancy Support and Defend, Tom Clancy Full Force and Effect, Tom Clancy Commander in Chief, and Tom Clancy True Faith and Allegiance. With Tom Clancy he coauthored Locked On, Threat Vector, and Command Authority. He has written six books in his own Gray Man series: Gunmetal Gray, Back Blast, Dead Eye, Ballistic, On Target, and The Gray Man. In his research for these novels, he traveled to fifteen countries, and trained alongside military and law enforcement in the use of firearms, battlefield medicine, and close-range combat tactics.