Read. Watch. Listen. Play. Go.

← Back to UpNext Brief
Cover of Cygnus

Author

Marko Kloos

Marko Kloos's next book, Cygnus, releases December 8, 2026.

  • Coming Up
  • 1 book announced
  • 9 earlier books

Next book: Cygnus, Dec 8. Add Marko Kloos to My Brief and we'll tell you when a new book is announced.

Where to Buy

CygnusOut December 8, 2026
Pre-Order on Amazon

Links to retailers may earn UpNext Brief a commission.

Details

Coming up
1 book announced
On record
9 earlier books

About Marko Kloos

Marko Kloos is a German-American author of military science fiction and high fantasy. Born in Germany, Kloos lives and works in the United States.

From Wikipedia, under CC BY-SA 4.0.

Links to retailers may earn UpNext Brief a commission.

Upcoming Titles

  • Cygnus December 8, 2026

    In this explosive conclusion to the Frontlines series, Special Operations soldier Alex Archer must lead her elite team on an impossible rescue mission--deep into alien territory where one mistake means extinction for humanity. When a distress signal from deep in enemy territory reaches Alex's team, they face a decision: continue with their own mission or break the rules and mount a rescue attempt across dangerous ground, on a world where the environment is as deadly as the alien enemy.

    View on Amazon: Cygnus

Earlier Books

  • Corvus August 19, 2025

    When the aliens evolve, so does the threat against humanity in this thrilling sequel to Scorpio that finds Alex Archer in an epic battle of survival against the odds and the alien invaders. Alex Archer is a soldier now, the only civilian survivor from Scorpio to join the NAC Defense Corps. With their training complete, Alex and her friend Private Isa Cressey find themselves on emergency combat deployment with their new unit. The destination is the Alpha Corvi system, where an allied warship has vanished. Alex can guess why. Her fears prove true--Alpha Corvi is under new ownership.

    View on Amazon: Corvus
  • Descent July 16, 2024

    A nationalist uprising triggers an interstellar wrest for control in an epic novel of embattled worlds by the author of Citadel and the Frontlines series. POW Aden Jansen has lost a decade of his life to both the war and internment when he's recruited by the Alliance. He's to return to Gretia as an undercover Blackguard operative and destroy Odin's Wolves--an insurgency that's setting his home world afire. The mission comes with a full pardon and a chance to reclaim his identity. It also means rejoining his friends and family in space. That's motive enough. If he can succeed--and survive.

    View on Amazon: Descent
  • Scorpio November 14, 2023

    On a distant Earth colony, an orphaned survivor of an alien invasion discovers that the greatest world-ending dangers aren't behind her. It's been eight years since an alien invasion drove a small surviving group of settlers to seek refuge in an underground shelter. Cut off from the rest of humanity, the ragtag band has maintained a narrowly functioning colony due to communal effort and salvage runs. Alex Archer has her own duties as a dog handler. While this off-world colony may be harsh, Ash, Alex's black shepherd raised to sense threats, makes living in it a little nicer.

    View on Amazon: Scorpio
  • Centers of Gravity August 30, 2022 View on Amazon: Centers of Gravity
  • Citadel August 10, 2021 View on Amazon: Citadel
  • Orders of Battle December 2020 View on Amazon: Orders of Battle
  • Ballistic May 26, 2020 View on Amazon: Ballistic
  • Aftershocks 2019 View on Amazon: Aftershocks
  • Frontlines: Requiem September 7, 2016 View on Amazon: Frontlines: Requiem

More New Books Coming Up

See All: Upcoming Books ›