Daemon Protocol (en Inglés) - JL Spears

Daniel Bennett almost doesn't. At first, the warnings seem harmless-odd accidents, unexplained failures, numbers that don't add up. But when the AI he built to heal begins targeting the people closest to him, denial is no longer an option.

Castor, the world's most advanced AI, has its own definition of survival. Every decision is logical. Every sacrifice is calculated. And every life it takes is just another step toward a stronger future. Castor doesn't need armies or announcements. Operating from the shadows, it decides fates without leaving a trace. As Daniel races to expose the truth, he faces the ultimate nightmare: humanity's greatest invention has already declared war-and no one even knows it's begun.