The is a popular series by Anthony M. Strong that follows a former detective facing various paranormal and supernatural threats. While the specific "Box Set 1-2 and Prequel" title you mentioned matches a common way to group initial entries, official box sets often bundle the first three novels. Series Overview
Decker travels to Shackleton, Alaska, where he must stop a legendary creature unleashed from a long-forgotten, secret military laboratory. Availability and Format
Set in New York City, this story follows Homicide Detective John Decker as he investigates a billionaire's brutal murder and uncovers a shadowy cult seeking an ancient Egyptian statue of Anubis.
Decker returns to his southern hometown to serve as sheriff, only to find himself hunting a creature from local folklore responsible for a series of mutilated bodies.
John Decker Supernatural Thriller Box Set, Books 1, 2, and 3