The Echo Code

When cryptologist Mara Ellis learns that her estranged father, Adrian Ellis, has been murdered under mysterious circumstances, she’s pulled into a global conspiracy surrounding his final creation: The Echo Code—an experimental signal meant to enhance memory, but one that instead fractured consciousness itself. The experiment gave rise to the Mirrorborn: people caught between humanity and machine, living echoes of the signal. Now, an ancient fragment of the network has reawakened in the form of Nyra, a powerful entity born from the first test subject. Unlike the Mirrorborn, she doesn’t mimic—she transmits. And she wants to overwrite humanity itself.