In the heart of Chicago, a divine message is a death sentence.

When a woman's body is found propped against a headstone in a quiet cemetery, Detective Thomas Blade is assigned a case that defies all logic. The only clue: the words "By the Grace of God" scrawled in blood above her. The cause of death is strangulation, but the brutality suggests a force beyond human strength.

As more victims appear in cemeteries across the city, Blade and his partner, the sharp-witted P.I. Carla Redding, uncover a terrifying pattern. The killings are not random; they form a sinister, supernatural design. With clues pointing to sulfurous residues, mysterious flashes of light, and a homeless man possessed by a malevolent force, they are plunged into a nightmare that stretches the boundaries of their reality.

Their investigation leads them to a desperate priest and a reclusive professor who speak of portals to another realm and a demonic entity known as the Collector—Satan's own brother, who hunts souls and mocks God with his gruesome displays.

To stop the slaughter, Blade must confront an enemy that bullets can't kill. Facing a battle that will test his courage, his faith, and his very sanity, he must risk everything in a desperate gambit to close a gateway to hell itself.

By the Grace of God is a gripping supernatural thriller that blends procedural crime with chilling paranormal horror, perfect for fans of Dean Koontz and Preston & Child.