BookBingeFrontlines Books in Order
The short answer
Marko Kloos · 8 books
- How many books?
- There are 8 books in the Frontlines series, published 2013–2022.
- Is it finished?
- No — it's ongoing, but the next book doesn't have a release date yet.
- Where to start
- Start with Terms of Enlistment (2013).
About 2,400 pages — roughly 40 hours of reading
A fast-paced military science fiction series following a young recruit fighting for survival on Earth and against an unknown alien threat among the stars.
Here is the complete Frontlines reading order — all 8 books by Marko Kloos, in the order you should read them:
Reading order
- Terms of EnlistmentA young recruit from an overcrowded, impoverished Earth joins the military for a better life and finds himself thrust into interstellar war.2013171 pages
- Lines of DepartureAndrew Grayson faces a brutal alien enemy and the crumbling loyalty of humanity's fractured military forces.2014315 pages
- Angles of AttackGrayson is pulled into a desperate last stand against the alien threat as humanity's survival hangs in the balance.2015338 pages
- Chains of CommandAs tensions boil over between Earth's factions, Grayson must navigate both political strife and the ongoing alien war.2016384 pages
- Fields of FireGrayson returns home to a fracturing society as old conflicts threaten to erupt into civil war.2017302 pages
- Points of ImpactGrayson faces new alien contact and the political fallout of humanity's ongoing struggles both on and off Earth.2018300 pages
- Orders of BattleGrayson confronts a renewed threat as uneasy alliances with the alien Lankies are tested.2020
- Centers of GravityGrayson and his allies face escalating conflict as humanity's fragile coalition strains under new pressures.2022
Good news: for this series, reading order and publication order are the same — just read straight down the list.
Track your place in Frontlines
BookBinge remembers which book you're on and writes a spoiler-safe recap before every sequel. Free on iOS.
Get BookBingeFrequently asked questions
How many Frontlines books are there?
There are 8 books in the Frontlines series by Marko Kloos, from Terms of Enlistment (2013) to Centers of Gravity (2022). Together they run to about 2,400 pages.
Is the Frontlines series finished?
No, it's ongoing. The most recent book is Centers of Gravity (2022), and Marko Kloos hasn't dated the next one yet.
What is the first Frontlines book?
Terms of Enlistment (2013) is book one, at 171 pages. A young recruit from an overcrowded, impoverished Earth joins the military for a better life and finds himself thrust into interstellar war.
Should I read the Frontlines series in publication order?
Yes. For the Frontlines series, reading order and publication order are the same — Terms of Enlistment (2013) through Centers of Gravity (2022).
How long does it take to read all Frontlines books?
About 2,400 pages across 8 books — roughly 40 hours at a page a minute. The longest is Chains of Command (384 pages); the shortest is Terms of Enlistment (171 pages).