A sidelined Marine officer is thrust into the deadly world of espionage, where one mistake could cost his life-or tip the global balance of power in Russia's favor-in the electrifying first book of an original series from New York Times bestselling author M.P. Woodward, acclaimed for his novels in the Tom Clancy Jack Ryan universe.

When Captain Jackson Mayne is reassigned to Istanbul as a temporary naval attaché after a near-fatal combat injury, he expects desk duty, not danger. But when a routine intelligence request pulls him into the wake of a mysterious cargo ship, Mayne stumbles into a high-stakes international conspiracy involving Russian intelligence, a rogue mathematician, and a shadow financial network capable of funding a devastating new offensive.

As covert CIA operations collide with Russian intelligence, Mayne is hunted across continents-from the streets of Istanbul to the Black Sea and beyond-forced to rely on instincts honed in combat rather than diplomacy. Operating outside official channels, he must navigate shifting alliances and buried secrets to stop a clandestine funding network that could hand Russia a strategic advantage across Europe.