Order of Frontlines Books
German author Marko Kloos crafts his compelling Frontlines military science fiction series around the year 2108, where Earth has become a harsh place for those struggling at society's bottom. The protagonist, Andrew Grayson, finds himself trapped as a "welfare rat" until he makes the pivotal decision to enlist in the military, hoping to forge a path toward a better future.
Launching in 2013 with Terms of Enlistment, Kloos' Frontlines saga continues to unfold with new installments. The following list presents Marko Kloos' Frontlines novels arranged by their original publication dates, which align with the series' chronological sequence:
| # | Title | Year | Buy |
|---|---|---|---|
| 1 |  Terms of Enlistment | 2013 | |
| 2 |  Lucky Thirteen | 2013 | |
| 3 |  Measures of Absolution | 2013 | |
| 4 |  Lines of Departure | 2014 | |
| 5 |  Angles of Attack | 2015 | |
| 6 |  Chains of Command | 2016 | |
| 7 |  Fields of Fire | 2017 | |
| 8 |  Points of Impact | 2018 | |
| 9 |  Orders of Battle | 2020 | |
| 10 |  Centers of Gravity | 2022 | |
| 11 |  Echoes of Silence | 2025 |