When African jihadis attack a Nigerian regiment using American weapons, Juan Cabrillo and the Oregon crew are on the case, investigating from Afghanistan to Kuala Lumpur to track a mysterious arms dealer known only as the Vendor. Cabrillo goes undercover to find the Vendor’s base, but his adversary isn’t just an arms smuggler. He’s an arms maker, and Cabrillo just walked into a lethal military game alongside the most dangerous mercenaries in the world, designed to test the Vendor’s cutting-edge AI arsenal. And yet, surviving an arena full of flame-throwing robots isn’t even his biggest problem. The Vendor has an army of high-speed drones headed for a pivotal military site, and if the Oregon crew can’t stop them from releasing a deadly neurotoxin, the entire globe will erupt in conflict.

When Juan Cabrillo is hired to extract an undercover operative in Kenya, he finds himself on the trail of a deadly international plot. A Saudi Prince seeks to unleash a deadly assault on U.S. forces, sparking a new war in the Middle East and ultimately destroying Israel. Cabrillo’s crew have met their most fearsome adversaries yet: a force of bio-hacked soldiers endowed with extreme strength and stamina and an unquenchable appetite for violence. The Oregon team must journey from the Amazon rainforest to an abandoned monastery in Eritrea before a final showdown in the mountains of Yemen, using every shred of courage and cunning they can muster to disable the ship-killer missile before the Arabian Sea becomes a mass grave.

When Juan Cabrillo fails to capture the leader of Mexico’s most dangerous drug cartel and loses an Oregon crew member in the process, he’s determined to get revenge. Little does he know that the explosion he just narrowly escaped was merely the latest flash of violence from a machine of war that has existed for decades. Cabrillo’s Corporation of mercenaries may have finally met its match in The Pipeline, a criminal syndicate passed down from father to son across generations. A group that sits with its finger on the trigger of a torpedo so deadly it could level entire cities. With millions of innocent civilians hanging in the balance, the Oregon’s crew must unravel a tangle of drug-smuggling routes and international conspiracies.

While on vacation in Barcelona, Jack Ryan, Jr. is surprised to run into Renee Moore, an old friend, at a small café. After making plans to meet later, Jack leaves, and the café is destroyed by a suicide bomber. A desperate Jack plunges back into the ruins to save his friend, but it's too late. As she dies in his arms, she utters one word: "Sammler." When the police show up, they are initially suspicious of Jack until they are called off by a member of the Spanish Intelligence Service. This mysterious sequence of events sends the young Campus operative on an unrelenting search to find out the reason behind Renee's death. Along the way, he discovers that his old friend had secrets of her own --- and some of them may have gotten her killed.

The CIA's deepest secrets are being given away for a larger agenda that will undermine the entire Western intelligence community. Director of National Intelligence Mary Pat Foley wants it stopped but doesn't know who, how or why. Jack Ryan, Jr., is dispatched to Poland on a different mission. The clues are thin, and the sketchy trail dead ends in a harrowing fight from which he barely escapes with his life. If that's not bad enough, Jack gets more tragic news. An old friend, who's dying from cancer, has one final request for Jack. It seems simple enough, but before it's done, Jack will find himself alone, his life hanging by a thread.

Twenty-six years ago, Dr. Cathy Ryan restored the eyesight of a young Bosnian girl who had been injured during an attack in the Bosnian War. Today, her son, Jack Ryan Jr., has agreed to track down the young woman and deliver a letter from his mother. What he finds shocks them both. The helpless child has grown into a remarkable woman. Aida Curic is a self-possessed beauty with a big heart and an even bigger secret who runs a controversial refugee agency near Sarajevo. Jack is deeply drawn to both her and her country, but soon finds himself in the crosshairs of the seething ethnic tensions and ancient blood feuds of the Balkans, the region of Europe where empires go to die.

A former U.S. senator and defense contractor needs someone to look over the books of Dalfan Technologies, a Singapore company. He turns to Jack Ryan, Jr. and Paul Brown, two employees of one of the best financial analysis firms in the country, which also happens to be the cover for The Campus, a top-secret American intelligence agency. Brown has no idea that Jack works for The Campus. Jack has no idea that the awkward accountant has been tasked with uploading a cyberwarfare program into the highly secure Dalfan Technologies mainframe on behalf of the CIA. On the verge of mission success, Brown discovers a game within the game, and the people who now want to kill him are as deadly as the cyclone bearing down on the island nation.