Jack Ryan， Jr。 is the one man who can prevent a second Korean War in the latest thrilling entry in the #1 New York Times bestselling series。

When the leader of North Korea is catastrophically injured， his incapacitation inadvertently triggers a "dead-man's switch，" activating an army of sleeper agents in South Korea and precipitating a struggle for succession。

Jack Ryan， Jr。 is in Seoul to interview a potential addition to the Campus。 But his benign trip takes a deadly turn when a wave of violence perpetrated by North Korean operatives grips South Korea's capital。 A mysterious voice from North Korea offers Jack a way to stop the peninsula's rush to war， but her price may be more than he can afford to pay。