Mindy Sanchez
What if the people around you are exactly who they appear to be-but you have no way to prove it?Mara Ellison has spent weeks investigating a terrifying possibility: that some people can behave exactly like human beings while something essential may be missing behind their eyes. A stranger on a train. A grieving son at a funeral. Her own sister. Even the people she once trusted without question.But the deeper Mara digs, the less certain everything becomes.Secret experiments. Missing memories. Impossible photographs. A mysterious dark-haired man who seems to know her entire past. A research institute obsessed with consciousness. And a childhood memory that may have been deliberately buried.Then Mara discovers the truth about the experiment.She was never simply studying the people around her.She was being observed.Now every memory, every conversation, and every person she encountered must be reconsidered. Even her own identity may not be what she believed.Because consciousness cannot be seen from the outside.And if you cannot prove that another person is truly aware, how can you prove yourself?The final message has been left behind.But it wasn’t written for Mara.It was written for whoever finds it next.