INSPIRATION FOR THE THRILLING AMAZON PRIME SERIES JACK RYAN . . . Command Authority sees the return of Tom Clancy''s greatest hero, Jack Ryan.Decades ago, as a young CIA analyst, President Jack Ryan, Sr. inadvertently uncovered the existence of a KGB assassin, code-named Zenith. He never found the killer.In the present, President Valeri Volodin has risen to power in the Russian republic. But the foundations of his empire are built on a bloody secret from the past, and he''ll eliminate anyone who comes close to that truth.When an old friend of the Ryans is poisoned by a radioactive agent, the trail leads to Russia. And for Jack Ryan, Jr. it''s time to finish what his father started . . .Tom Clancy''s Command Authority is a brand new full-throttle all-action adventure, and follows Threat Vector and Locked On as the newest Jack Ryan novel.Praise for Tom Clancy:''Exhilarating. No other novelist is giving so full a picture of modern conflict'' Sunday Times''The inventor of the techno-thriller'' Daily Telegraph