Infinite Echoes by Skip Vanderburg

Elias Nova stood at the precipice of an irreversible decision. The world outside his window had begun to blur into the insignificance of monotony. At seventy-five, with a lifetime of memories etched into his mind and body, he had grown weary of the slow erosion of time. The promise of death no longer felt like a gentle sleep but a looming void. That's when they approached him—offering immortality, not in flesh, but in code.