On a routine intelligence gathering mission in Tehran, Jack Ryan, Jr., has lunch with his oldest friend, Seth Gregory, an engineer overseeing a transcontinental railway project. As they part, Seth slips Jack a key, along with a perplexing message. The next day Jack is summoned to an apartment where two men claim Seth has disappeared - gone to ground with funds for a vital intelligence operation. Jack's oldest friend has turned, they insist. They leave...

The world trembles on the brink of a second Korean War. And Jack Ryan, Jr. is the one man who can prevent it. When the Supreme Leader of North Korea is catastrophically injured, his incapacitation triggers a dead man's switch, activating an army of sleeper agents in South Korea and precipitating a struggle for succession. Jack is in Seoul to interview a potential addition to the private intelligence organization The Campus. But his benign trip takes...

Jack Ryan, Jr. is in a world of trouble. A mid-air collision between aircraft from rival nations in the South China Sea threatens to serve as a flash point for the entire region. As Jack frantically tries to put the pieces of the conspiracy together, the Campus is hit with a crippling attack. When the dust settles, Jack is one of the few operators still standing, and the Campus's de facto leader. But the fight is just beginning. As tensions escalate,...

Jack Ryan, Jr. finds himself cut off from his comrades at The Campus just when he needs them most. He's smack dab in the middle of an international conspiracy, and this may be too much for even he to handle.