In reading order
Patient Zero
Jonathan Maberry
The Dragon Factory
Jonathan Maberry
The King of Plagues
Jonathan Maberry
Assassin's Code
Jonathan Maberry
Extinction Machine
Jonathan Maberry
Code Zero
Jonathan Maberry
Kill Switch
Jonathan Maberry
Dark of Night
Jonathan Maberry, Rachael Lavin
Dogs of War
Jonathan Maberry
Deep Silence
Jonathan Maberry
Avalon Station
Jonathan Maberry
Joe Ledger
Jonathan Maberry
Joe Ledger: Secret Missions, Volume One and Two
Jonathan Maberry
Joe Ledger
Peter Clines, John G. Hartness