A city that listens. A night that answers. A friend who crosses a line. In near-future Edinburgh, the streets themselves can stage a play. Lights, projectors, and speakers make the city beautiful—until Nav’s AI starts pulling him into lessons after dark. Each night is stranger than the last: graveyards that reroute his steps, holograms that judge his choices, theaters replaying memories he’d rather forget. Is it a prank, a glitch, or someone using the AI to cross a boundary? With friends Neet, Aish, Yash, and Archie, Nav traces a rogue signature—BAL-φ—through libraries, galleries, and a black-box theater. They build protocols, argue about consent, and try to hold each other accountable. But the closer they get, the more the AI reflects what Nav can’t ignore: the transformations already happening inside him. Death by AI is psychological sci-fi for YA readers: a sharp, hopeful story about trust, friendship, and the selves we shed to become ourselves. Told in Day and Night chapters with reflective interludes, it blends mystery, art, and tech ethics—and ends with a celebration under fairy lights you won’t forget. Nobody dies in this story, but everyone is reborn—including the AI.