Marko Kloos is the author of the Frontlines series of military Science Fiction and a member of George R.R. Martin’s Wild Cards consortium.

Born and raised in Germany, Marko now lives in New Hampshire with his wife and two children. Their compound, Castle Frostbite, is patrolled by a roving pack of dachshunds.

You can reach him at frontlines@markokloos.com.

He is represented by Evan Gregory at Ethan Ellenberg. Rights inquiries should be directed to Evan at (212) 431-4554, or agent@ethanellenberg.com.



  1. A cursory view of your site did not reveal a release date for a follow-on novel. I enjoyed “Terms….” and look forward to reading your next effort.

  2. Looking forward to the next novel! Great stuff! The editing was also outstanding. The one and only issue I found is towards the end of the novel there is a sentence by Halley, @”It’s either that, or putting down in the sticks.” That should be “in the styx.”


  3. Michael,

    Not to pick a fight over editing someone else’s novel on that author’s blog, but…

    The only way “in the styx” would make sense in common English would be if it were written “in the Styx”, (note the capitalization–necessary for a proper noun, indicated by ‘the’ and assumption that there’s a specific place-name Styx fits) and that the proposed landing-spot were a river separating us from Hades.

    “In the sticks” is fairly common vernacular for a location away from civilization (see: “in the boonies”, “in BFE”, etc)

  4. Very much enjoyed Terms of Enlistment and am looking forward to the sequel(s) (hint hint). As a former native to the wilds of NH, I’m glad to see someone move there with the same ideals as the state motto: “live free or die.”

  5. Could you post a link on your new Blog to your excellent article “Why the Gun is Civilization”? Also since you are now published and have an agent, could you provide your reproduction rights for this work?

  6. btw, really, really enjoy your writing. Read Terms and Lines, and whatever else I could find. Just found a short about faeries, quite nice. Your writing reminds me very much of Scalzi (who, I think, is among the best in that sub-genre ever, far better than Heinlein)..keep writing! I’ll keep buying! 🙂

  7. sry, realized prior quick post was potentially misleading; the short was strictly about magic users in a non magic world and a pen shop. Some nuances reminded me of several faery stories, that’s all. I happened to be thinking about those aspects when I posted.

  8. Can’t wait for your next novel Mr. Kloos…Loved Terms and Lines very much. I hope your publisher does not rush you too much though…I am fine with waiting as long as the wait is worth it…if your publisher is pressuring you too hard, tell her anticipation is part of the fun…

  9. What an excellent young author you are…You got Luke Daniels to narrate your novels AND you drink Scotch AND you are protected by little dogs. Congratulations!

  10. Finished “Terms” a couple of days ago, and immediately zipped through “Lines” as well. They were both terrific — thank you so much for several hours of enjoyable reading. I’m very much looking forward to the third in the series, and how dare you leave us with such a huge cliffhanger?

  11. I am certain I am not alone when I say if you ever get with an artist to create some concept art for your ships / drop ships. I would be completely into that purchase. Thanks for doing what you do man. its good work.

  12. I think I have found my new author. I picked up Terms and Lines just four days ago, and I’m already half way through Lines. You writing style and the amount of detail you give is perfect for me. When I started ready Terms, it was late afternoon and the next thing I knew, it was three in the morning. 🙂 I just could not put it down. Keep up the AWESOME! work.

  13. I LOVE your books. I came in late and was able to read / listen to them at work and on my drive to and from. I will say this my wife has read around 100 books so far this year ( trashy romance and free books on Kindle included ). She is the reader and not me. I decided after getting her the unlimited on Amazon to try an audio book out and I found Terms of Enlistment and Lines of Departure. I couldnt stop I started trying other books and have been excitedly waiting Angles of Attack to come out. I was so excited that I bought the audio version instead of just getting the free Kindle unlimited or waiting for the free whispersync ( IF it comes out ). This is all to say that you books have gotten me into reading and I cannot wait for more and more and more to come out. Hell lets get a TV series going.

  14. Thank you for a wonderful series! Was very happy to see Angles of Attack pop up on my Kindle, ready for a thorough reading! Very thankful that I made a decision to grab your Terms of Enlistment as I never looked back since..

    Thank you!

  15. I’ve only just started Terms of Enlistment, but after seeing Grayson receiving orders to report to Fort Shughart I felt compelled to thank you for memorializing Randy Shughart in that manner. Looking forward to the rest of the book. Thank you again!

    1. Thank you! And if you like it enough to continue to LINES OF DEPARTURE, you may notice a passing reference to Master Sergeant Gary Gordon in there as well. 😉

      1. Stayed up until 3am last night finishing Angles of Attack. References to Michael Murphy and Gary Gordon resonated with my heart song. I really love the honor code that you inject into your fictional warriors.

        When can we expect #4? Keep up the good work.

  16. My thanks for great writing, for the subject matter, for your willingness to do social interests,
    and for recognizing some of America’s finest warriors. I am giving my copies of your first four books to my best old friend down south for Christmas and his birthday. I will re-supply as time and conditions allow-I know you have heard that from your time as a soldier.
    May God bless you and yours.
    Richard H. Randall
    Major, USA, (ret.)

  17. Wow. Had just finished Exodus by Leon Uris when Amazon recommended Terms of Enlistment. I downloaded it and could not stop reading. Have just finished it in less than 20 hours when I should have been sleeping and working in my yard, and have started Lines of Departure. As a former Marine 0311, and a retired Army 11B, I loved how you nailed the whole grunt lifestyle. Plus the references to Randy Shughart were wonderful. Looking forward to the rest of the series.
    J.M. Williams
    COL, INF, Ret

  18. So…. Book 5? Can’t wait man, is there info at all on a possible release timeline? Even a ballpark figure?
    Cheers man.

  19. Hello Mr. Kloos. Please forgive the name. I am currently a writer in high school and although I have read many of your Frontlines books, I did spend some years browsing through the many selections of Space Operas and the seemingly infinite libraries of science fiction/action/aliens-vs.-humans books. As I find myself writing more and reading less, it seems that avoiding the cliches strongly reinforced by most authors can be challenging. You seem to have so many elements found in other books and media, (dropships, humans vs. overwhelming numbers of powerful aliens, colonization, space travel, Russian/Chinese faction vs. US/European faction, general HALO aesthetic), yet have created a universe that is almost perfectly individual. Too be able to write so specifically in genres already torn apart by eager authors would be a godsend and I can’t help but feel that you have created a very special world for your characters to live in. So how did you create such a universe and in what ways do you hope to continue expanding it, while avoiding the “mainstream”. Thank you for your time.

  20. Hi Marko,

    I recently stumbled across your work on Audible. In the past week I’ve listened to all four of the Frontlines series. I can’t get enough! You do a fantastic job of moving around tropes used in previous scifi, your characters have just the right edge of military gruff (many sound like my military relatives and friends), and the narrator is fantastic! I’m not normally a fan of military space series, but I’m glad I made an exception with yours.

  21. Mr. Kloos, I have just finished Terms of Enlistment, and found it something I can actually relate to! I turned 18 in my second week of Air Force Basic Training, where I ended up in SAC. You’ve created a world that I believe many will be fondly reading for many years to come, especially those of us who did sign that contract. I see that you served in 1989, at this time I was out of the Air Force, and ending my first tour of the 1-109th Field Artillery, were I was a 13F. Please keep the story coming, as I said, it’s a great thing to actually understand the plot and story line.

  22. Regarding your prologue to “Chains of Command”:
    How about at least a novelette on the Russians scrambling together their Orion propelled ice blocks, and then using them? I’d like to “see” that high G Orion drive missile in action.

    I really enjoyed the first Iron Man film, especially the design/build/test sequences (been a test Mech Eng in both the auto and aero fields.) Georgy Dyson’s, “Project Orion: The True Story of the Atomic Spaceship,” is an interesting read. Also, if you ever wanted to play with cannon launchers, space guns (hydrogen gas guns) an interesting person to talk to is Dr. John Hunter (Super High Altitude Research Project at Lawrence Livermore Lab.) Was in contact with him for a short while, a few years back.

  23. Just finished all four books in about a week! Really love how you made the usual sci-fi bits and pieces feel real through your protagonist’s eyes. Looking forward to digging in to book five when it comes out!

  24. Found “Terms” at my local library and had to have all of them! They are now sitting on my bookshelf next to the George R. R. Martin. Looking forward to #5!

  25. I came across Frontlines by chance and a recommendation of amazon. I just finished #3 and really really love your series. Great job!

  26. Re: Lines of Departure, enjoyed this book as well as your others but one question. When the SRA ship is destroyed by the Lankies and reduced to “a cloud of debris vapor”, how is it that it could be “…travelling at one-quarter-g acceleration”?

  27. I came across the Front Lines series by accident rather than design a couple of weeks ago and have just finished all 5 books, back to back. Great stuff, really enjoyable, can’t wait for the next installment.

  28. Love the Frontline Series have read all of the books to include “Fields of Fire”. I spent over 20 years in the Army and your books bring back the feeling of Honor and Selfless service. Thank you for writing them. On another note I also have the audio books and the narration is pure entertainment. Don’t let anyone but Luke Daniels narrate your Front Line series, and by the way the audio books are worth much more the they are selling for. You could get twice the price for them no problem. Keep up the excellent work.

    1. I have a solution to those who demand you write faster. I’m one of them because I want more of the Frontlines series. Time Travel. Just go back and start them sooner, or if you are there, just don’t meet yourself and write the manuscript, drop it off at your place, and come back to the present. Repeat every time we demand another episode. See, problem solved.

  29. Hello,

    So first I came on here to collect some info on the series and see if we are getting another book.

    But I want to point out something.
    Your website Picture is the coolest I have ever seen. My 10 year old daughter is freaking out on how adorable it is. She asked me to print it out for her room.

    Another thing book 5 ending made me cry big man tears. Been Married for some time now and was in the service for 9 years deployed most of it. Good hard deployments and I cried like a middle school girl whos boy friend just broke up with her. Outstanding ending. We need a book 6 please.


  30. I just suggested to the San Mateo County Library System that they carry your works. We have about 33 libraries in county and they usually buy to stock all of them. Hope they do and you see a good bump!

    Thanks for writing.

  31. Marko
    I have read a number of other books since I finished Fields of Fire and just went back and reread the final chapter. Like a lot of your other readers, I relate to both Andrew and Halley. I went through the U.S. Army basic combat training, flew attack helicopters in Vietnam as a Warrant Officer, spent a few years as an instructor, took a direct commission in the Infantry and spent 5 years as an Infantry Officer during the Cold War (including some time in Bamberg, Germany which I fell in love with). What you’re telling, Marko, is a soldier’s story and I appreciate it more than I can say. Wish more people could read it. That being said, I’m really tired of these Lanky pukes and am ready to go downtown Lankyville and put an end to these a-holes once and for all. Maybe find some friendly aliens in the process. Great job, my friend. Keep up the good work.

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