Reading order
| # | Title | Published | Author | Buy on Amazon |
|---|---|---|---|---|
| 1 | The Tracker | 2017 | Chad Zunker | Buy |
| 2 | Shadow Shepherd | 2017 | Chad Zunker | Buy |
| 3 | Hunt the Lion | 2018 | Chad Zunker | Buy |
The Sam Callahan trilogy kicks off with The Tracker (2017), introducing a protagonist whose physical abilities and quick thinking put him at the center of dangerous situations. Shadow Shepherd (2017) and Hunt the Lion (2018) raise the stakes by sending Callahan into increasingly risky operations.
This was Chad Zunker’s first published series, and the three books are fast-moving action thrillers. The Sam Callahan books lean more toward international intrigue compared to Zunker’s later legal thrillers, giving readers a different flavor of suspense from the same author.