Barker and Llewelyn

1 Some Danger Involved (2004)
2 To Kingdom Come (2005)
3 The Limehouse Text (2006)
4 The Hellfire Conspiracy (2007)
5 The Black Hand (2008)
6 Fatal Enquiry (2014)
7 Anatomy of Evil (2015)
8 Hell Bay (2016)
8.5 An Awkward Way to Die (2017)
9 Old Scores (2017)
10 Blood Is Blood (2018)
11 Lethal Pursuit (2019)
12 Dance with Death (2021)
13 Fierce Poison (2022)
14 Heart of the Nile (2023)
15 Death and Glory (2024)
16 Season of Death (2025)