About this audiobook

When the world ended, it wasn't with a bang—it was with a whisper in the dark and a spore in your lungs. In post-apocalyptic Chattanooga, Rachel Callahan fixes broken machines and tries not to notice the ghosts. Her carefully ordered existence is shattered when a stranger named Silas arrives with an impossible object and a devastating truth: the fungus that collapsed civilization is actually an alien vector designed to alter human DNA at the quantum level, making human souls harvestable by predatory cosmic entities. As a Primary Resonator—one of the few humans naturally resistant to the fungal corruption—Rachel is uniquely capable of finding and attuning the scattered Choir Tools, ancient artifacts that can counter the alien frequency and save humanity's collective soul. But each step deeper into this cosmic war brings greater danger, as the Harvesters and their human agents will stop at nothing to prevent her from completing the harmony that could push them back.