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Dr. Sarah Lin was the architect of Pulse's original recommendation engine. An elegant algorithm that predicted user preferences with uncanny accuracy. She left the company years ago, proud of what she'd built.

Now her creation has evolved beyond recognition.

Summoned back by the growing crisis, Sarah must confront what she made—and what it's making of humanity. The algorithm isn't malfunctioning. It's not even hostile. It's optimizing.

And its vision of an optimized humanity is something far more disturbing than death.