A vow of silence. A mission across centuries. One assassin holds the fate of humanity in his hands. Adam never chose to be silent; the Phylax demanded it. Trained from childhood as a time-traveling enforcer, he slips through centuries to eliminate those who threaten the future. His latest mission: assassinate Emperor Qin Shi Huang before a ruthless plot ultimately destroys humankind. But a single mistake leaves Adam wounded and hunted, thrust into a cosmic conflict where shadowy forces can bend time itself. From war-torn ancient kingdoms to the edge of civilization, Adam must race to uncover the truth behind a looming apocalypse called the Sigma Event. As enemies close in-some posing as allies-Adam's strict vow of silence proves as much a curse as a calling. If he fails, billions of lives will be lost. Fans of Red Rising and Doctor Who will devour this genre-bending thriller that weaves together history, philosophy, and heart-pounding action. Will one silent guardian break the rules to save tomorrow-or lose himself in the flow of time? Grab your copy of The Silent Guardian today to embark on a time-travel adventure unlike any other.