Four successful investigations. Zero confirmed supernatural encounters. The Urban Exploration Society has debunked dozens of urban legends with science and documentation. Until Hillrose Penitentiary. What begins as another routine investigation becomes something else entirely when Marcus Chen's team discovers a pattern. A pattern that repeats across decades, etched into the prison's structure and buried in its records. As they document the anomaly, the pattern begins to replicate. In their footage. In their notes. In their perception of time itself. Some patterns demand to be observed. And observation changes the observer. The Fifth Anomaly is the first book in The Threshold Chronicles, a cosmic horror series exploring the boundaries between humanity and their place in objective reality. This edition features an integrated soundtrack experience. Scan QR codes at chapter endings to hear the music that accompanies each threshold. For readers of American Gods, House of Leaves, and the New Weird.