The Matrix Below St. Louis: Grief awakens an ancient power. The sigil grid.

In the newest installment of The Clairvoyant Files: Mysteries of the Marked, the Circle faces a threat unlike anything they have ever encountered-a silent force buried beneath a major American city, waiting centuries for the wrong moment to awaken.

When a surge of psychic energy ripples across underground structures in St. Louis, the Circle is dispatched to investigate. What begins as a routine supernatural investigation quickly escalates into a full-scale paranormal suspense mystery as Cha...