Reading order
| # | Title | Published | Author | Buy on Amazon |
|---|---|---|---|---|
| 1 | Head Cases | 2025 | John McMahon | Buy |
| 2 | Head Cases: A Novel | 2025 | John McMahon | N/A |
| 3 | Inside Man | 2026 | John McMahon | Buy |
Head Cases is John McMahon’s second series, introducing the PAR (Paranormal Activity Response) Unit. The first book, Head Cases, arrived in 2025 and takes McMahon’s crime writing in a new direction by adding paranormal elements to the investigative framework. Inside Man follows in 2026.
The series represents a departure from the grounded realism of the P.T. Marsh books. By introducing unexplained phenomena into criminal investigations, McMahon opens up new territory while keeping the thriller pacing that defined his earlier work.