- "The Fall of Rome"-serien:
- "Centurion" (2010)
- "Praetorian" (2011)
- "Legionær" (2012)
- "Equites" (2013)
- "Ørnen i sanden" (2014)
- "Blood Eagle" (2015)
- "Den siste legionæren" (2016)
- "The Siege of Paris"-serien:
- "Løgnens by" (2018)
- "The Walls of Rome" (2019)
- "Blood River" (2020)
- "Hevnens sverd" (2021)
- "The Crusader"-serien:
- "Deus Vult" (2012)
- "Lux Invicta" (2014)
- "Terra Santa" (2016)
- "Saladins hevn" (2018)
- "The Viking Warrior"-serien:
- "Shield Wall" (2016)
- "God of War" (2017)
- "Warlord" (2018)
- "Blodfeid" (2019)
- "The Saxon Chronicles"-serien (samskrevet med Bernard Cornwell):
- "Sword Song" (2019)
- "War Lord" (2020)
- "Enemy of God" (2021)
Faktalitteratur:
- "Ancient Roma:A Brief History" (2021)
- "Viking Wars:A Concise History" (2022)