Jack Ryan #9: Command Authority by Tom Clancy (2013)

Decades ago, when he was a young CIA analyst, President Jack Ryan, Sr. was sent on what was supposed to be a simple support mission to investigate the death of an operative who had been looking into suspicious banking activities at a Swiss bank. Ryan's dogged tenacity uncovered not only financial deceit, but also the existence of a KGB assassin, code-named Zenith. He was never able to find the killer. But in the shadowy world of covert operations, nothing stays hidden forever. In the present, a new strongman has emerged in the ever-chaotic Russian republic -- the enigmatic President Valeri Volodin. His rise to power was meteoric, but shrouded in deception and treachery. The foundations of his personal empire are built on a bloody secret from his past, and he will eliminate anyone who comes close to that truth. For he has set in motion a plot to return Russia to its former glory and might, with the rest of the world once again trembling in fear of the mighty Bear. When an old friend of