Reading order
| # | Title | Published | Author | Buy on Amazon |
|---|---|---|---|---|
| 1 | Gunboat Diplomacy | 2019 | Jason Cordova | Buy |
| 2 | Enforcer | 2019 | Jason Cordova | Buy |
| 3 | Daskada, The Legend | 2020 | Jason Cordova | Buy |
| 4 | The Gates of Hell | 2020 | Jason Cordova | Buy |
| 5 | High Mountain Hunters | 2020 | Jason Cordova | Buy |
| 6 | The Ravening of Wolves | 2021 | Jason Cordova | Buy |
| 7 | In the Wings | 2021 | Jason Cordova | Buy |
| 8 | The Executioners | 2022 | Jason Cordova | Buy |
| 9 | To Have and to Hold | 2022 | Jason Cordova | Buy |
| 10 | Defenders Rise | 2023 | Jason Cordova | Buy |
The Four Horsemen Sagas is a shared military science fiction universe in which humanity has entered the galactic mercenary trade. Jason Cordova contributed ten books to the series between 2019 and 2023, including Gunboat Diplomacy, Enforcer, and The Gates of Hell.
The series operates within a larger universe created by Mark Wandrey and Chris Kennedy, with multiple authors telling different stories within the same setting. Cordova’s entries follow different mercenary units and conflicts, fitting into the broader galactic-scale warfare that defines the Four Horsemen setting.