Command Authority Jack Ryan Series, Book 16.

In this Jack Ryan thriller, #1 New York Times bestselling author Tom Clancy delivers an electrifying story of intrigue, power, and a family with two generations of heroes.... Decades ago, as a young CIA analyst, President Jack Ryan Sr. was sent out to investigate the death of an operative-only to uncover the existence of a KGB assassin codenamed Zenith. He was never able to find the killer.... In the present, a new strongman has emerged in t...