If Black Mirror made you look at your phone differently... This is the novel that asks what happens when the phone looks back.

In 2045 Denver, a single efficiency score determines how citizens live. Jordan Reese has devoted her life to helping perfect the algorithms behind it. When she discovers a flaw she was never meant to find, she is drawn into an underground resistance called the Mosaic, navigating a double life as colleagues vanish and betrayal hides inside the ranks she’s learning to trust. The JNA calls it optimization.