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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. Alex must face the monsters from her childhood again as her regiment mounts a rescue operation to find and save the planet’s colonists. But this time, there is something terrifyingly different about their enemy. The Corps has evolved to meet the threat, but the Lankies have adapted as well—and they are more lethal than ever. What began as a rescue turns into a desperate fight for survival for Alex and her new friends, stranded on a hostile world forty-nine light-years from Earth. And the only way home goes right through the Lankies.

269 pages, Kindle Edition

First published August 19, 2025

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Marko Kloos

39 books3,297 followers

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Displaying 1 - 30 of 138 reviews
Profile Image for Charles.
617 reviews121 followers
September 22, 2025
Alexandra Archer a newly minted Space Marine fights a Bug War on a Lanky invaded colony planet in Kloos’ Frontlines Universe. Second book in the Frontlines Evolution series.

description
Corvus, an Arctic Desert planet with 400 hour days and nights.

My dead pixels version was a modest 269-pages. A dead tree copy would be 271-pages. It had a US 2025 copyright.

Marko Kloos is an American MIL-SF and fantasy fiction author. He has written more than ten novels, primarily in two series. This was the second book of his Frontlines Evolution series, a continuation of his Frontlines series. The last book I read by him was Descent (The Palladium Wars, #4) (my review).

Its strongly recommended to have a solid familiarity with the original Frontline series. This book heavily leverages a reader’s familiarity with its world building. In addition, having read Scorpio (Frontlines: Evolution, #1) (my review) would be helpful.

TL;DR

Alex Archer a colonial survivor of the alien Lanky invasion and siege of the Scorpio colony planet introduced in Scorpio did not adapt well to repatriation to a vaguely dystopian Earth. Seeking more order in her life, she joins the Spaceborne Infantry (SI), a service she' become deeply familiar with from Scorpio. On her first tour-of-duty’s mission, she’s on another Lanky invaded colony planet, but this time she’s armed and dangerous.

This was one of the better written books by Kloos I’ve read, and I’ve read several. The story was about bootcamp and then mission-oriented ground combats. Kloos does exceptionally well with the second part, and less well with the first. However, his YA-story style and content are dramatically at odds with the hyper-realistic action of the running and gunning.

The Review

This was one of Kloos' better books. However, he's backslid into more of the same YA story writing, from the previous book in the series, which was almost something adults would read.

In the past, Kloos’ stories suffered from both poor copyediting and proofreading. I found almost no errors here, just some repetition. However, he still needs to rein-in his technical exposition dumps, or find a better Technical Editor. For example, Kloos’ use and abuse of tactical nuclear weapons in the story, appears to have been gleaned from reading Popular Mechanics? Sometimes, Less is More.

This book continues the Sunday School-like YA narrative of the original Frontline series. That’s too bad, because the first book of this sub-series was somewhat adult. I have always found Kloos’ YA narrative to be at odds with the hyper-realism, and ultra-violence of his action scenes? However, the narrative of this story, particularly the dialog was a little more salty than Sunday School. There was a modest use of: shit, piss, fuck. However, some: soldiers, sailors, Marines, and airmen use F-Bombs as punctuation, particularly amongst themselves. Kloos was more sparing than that. Also, the profanity was not original. With some folks, it’s an art form invoking shock, awe and amusement.

Another missing component was that the characters were not in any way sexually attracted to each other. Put a: mixed sex group of healthy, strapping young lads and lasses in close quarters together, and they’ll be “doing it”. None of that happened or was even suggested. It was unreal. Kloos did spend a lot of words on folks chowing-down on the military-style food. It all had to have been heavily laced with anaphrodisiacs for them to have had (again) Sunday School behavior?

There was also no intemperate use of alcohol or drugs alluded to. When alcohol was found abandoned in theater, nobody filched a bottle for “subsequent use”. In addition, there was no use of soft or hardcore drugs. For example, nobody, hacked their armor’s auto-doc for amphetamines or barbiturates. Where there’s a will, there’s a way with folks in uniform.

Finally, there were no music references at all.

That Sex, drugs and Rock'n Roll, staples of off-duty and idling military personnel are missing from the story is a real flaw in the non-combat parts of the narrative. It makes me think that Kloos doesn’t want to, or know how to, realistically depict young men and women at ease? It’s actually harder to do than describing a meeting engagement between a SI platoon and a contingent of Lankies.

Kloo’s protagonist Alexandra Archer, 22-years old and an orphan was as much a Mary Su as the protagonist Grayson was of the previous series was a Marty Stu . Note that Grayson makes two appearances in this story. (This was obviously coming in the last book.) I frankly thought the female protagonist Archer was a better character in the first book, because she was less “good”. Also, she was not the most feminine character, I’ve read, created by a male author. I think all Kloos’ female characters walk like a woman man and talk like a man? He’s backsliding on rendering young men and women characters out-of-uniform and how they act and behave.

Plotting was very linear. Almost all of Kloos’ stories (the ones that don’t end in excretable Cliffhangers) involve The Cavalry trope. That's a habit that can’t be broken with him. The first part of the story was about Archer in Boot Camp. I didn’t find there to be any grueling challenges. It was not the harsh experience, where the weak are weeded out from the strong. The second part was brutal and bloody battles against the Lankies on Corvus with high-tech weaponry. It reminded me of Sahara (1943) . This included a lot of brave and selfless acts by Archer and her squaddies. Archer’s story arc was very predictable, she was in the SI. This was where she belonged.

A Forever War problem with Kloos’ stories is his idealization of military service. Everyone serving is a noble warrior. In this story there were no REMFs . In addition, he's repetitious about the great majority of SI recruits coming from the most disadvantaged elements of the future dystopian society. These recruits should be a built-in discipline problem. Soldiers under the stress of combat screw-up, and do bad things. Idle troops do worse things. They: go AWOL, steal, get drunk and disorderly, disrespect and disobey superiors and orders. They also fight and sometimes sexually harass or assault each other. None of this happens in Kloos’ stories. For the hyper-realistic Kloos to have Sunday School soldiers is a failure of imagination.

Another issue that continues with this book, is that in the Frontline universe, there was no diversity. Black, brown, and yellow are not skin colors amongst the Norte Americanos of the story. All the author’s characters also appear to be heterosexuals. I would have thought there would be ethnic and sexual diversity in the Earth population somewhat like the present? Finally, the stereotyped Russians 100-years in the future were pretty silly.

Summary

My reading experience with this new series has been mixed. It’s taken Kloos 13-books to be writing these last few better books. This book also shows the greatest attention-to-detail than any of the previous books in its presentation (Copyediting). The author’s love of details is also apparent and entertaining, when he writes about what he knows.

Please note that I only very rarely give serial fiction greater than a three-star rating. I feel that reusing: previously developed characters, worldbuilding, and extending plotlines to span books is much less difficult and creative than writing standalone novels.

I'm at 2.5 with this book. I'm spitefully rounding down for back-sliding from the previous series novel's better effort.

So, for this book, the ultra-violence of fighting monsters with heavy weaponry was good. The man/woman, soldier/sailor stuff has declined from the previous book’s. In general, there was a higher standard of prose, proofreading and copyediting in this story then in any previous books by Kloos I’ve read. This story is better than your average MIL-SF, which has a very low bar. However, this story was predictable in the author developing himself a new protagonist to take his new series forward, with the help of a legacy protagonist. Kloos needs to write more realistic stories about folks out of battle armour, than whilst wearing it, to be Leveling Up in his craft.
Profile Image for donna backshall.
828 reviews234 followers
August 20, 2025
Five dazzling stars for Corvus!

I don't gush often about a book, but it's not easy to hold back while talking about this one. I hadn't read Scorpio, the first in the Frontlines: Evolution series, when I got my hands on a copy of Corvus, so I read them back to back. Scorpio was great, and if I'd read it before, I certainly would have been searching for Corvus to come out.

As it turns out, I didn't need to read Scorpio first, as there was enough explanation and background to allow it as a standalone, but who would want to miss the full experience? Getting to know Alex, as her adventurous character grows and matures into the brave warrior against humanity's biggest enemy, the Lankies, has been both exciting and humbling for this earthbound human.

Did you enjoy Starship Troopers? (the unnerving military book, not the campy movie) If so, you will probably like this young adult version of a "citizen" doing her part to combat intergalactic colonial pests, which happen to be the size of a dinosaur, practically unkillable, and smart as hell.

I have to say, Corvus is actually better than Scorpio. Alex's character growth is phenomenal, and I was glad to see some things hinted at in Scorpio come to fruition.

I had not read any books by Mark Kloos (pronounced like "close", who knew?) before, but a casual look through Goodreads shows there's plenty more where this came from. Having been in a bit of a book slump, this news has me thinking this coming winter is going to be ALL SCI-FI, ALL DAY.
Profile Image for Lindsay.
1,406 reviews264 followers
August 26, 2025
Alex Archer has come a long way since her childhood dodging Lankies on the colony planet of Scorpio. Now a PFC in the NAC Defense Corps, Alex is training to return to the fight against the Lankies. Her first assignment is as part of a carrier rescue force for an allied colony in the Alpha Corvi system. But this time the Lankies are different. Stronger and faster and they have clearly evolved to match the new technology and tactics that humanity are employing.

The first one in this series was brilliant. This one is not quite as good, but that's mostly because it's a stage-setting book: it lays out the problem facing humanity in this series, and it positions Alex in a key position to go along with the solution. I continue to be impressed with how much this author has leveled up through his writing career, and as a result, this is some of the best military SF out there.
Profile Image for Athena (OneReadingNurse).
971 reviews140 followers
September 14, 2025
Yaaassss the character reunion in this book! I love the group that will be moving forward together!!

When's the next one coming!!!
Profile Image for SheLove2Read.
3,107 reviews204 followers
September 19, 2025
A bit of a slow start, but worth it in the end! I love Alex and how she's grown into herself after joining the Infantry. Looking forward to the next installment!
Profile Image for Stephen Robinson.
34 reviews
October 17, 2025
That Avengers Assemble moment at the end alone almost made the book four stars for me. A couple of legacy characters return in a BIG way as well, which had me kicking my feet and smiling from ear to ear the whole time.

Marko has somehow managed to refine what I enjoyed about the previous books, the ground combat/encounters in particular are downright intense here (and in Scorpio), and not only improve upon the formula and his writing in general, but evolve (ha!) the premise of the series too. Despite the series being so action-heavy, my favourite moments have always been the quieter ones, and Alex is the perfect vehicle for these. I love how introspective she is, while still being perfectly capable of commanding a team and raising absolute hell.

My biggest criticism though is mostly towards the supporting characters, and their lack of defining backstories and fleshed out histories. Alex's dynamic with her squad is fun, though, and Marko's writing does a lot to elevate their interactions.

Despite some minor issues, I really can't wait to follow Alex even further down the lanky rabbit hole and spend more time with these characters I've grown to love.
Profile Image for Lisa.
322 reviews16 followers
January 1, 2026
3.25/5

Very similar arc to the OG series, Frontlines. Even down to reminiscent character traits to a certain soldier named Grayson. The main antagonist of the entire universe is still largely not understood, so that feels like treading water. Still, the writing is adequate and the action hums along - it’s just a bit of a comedown from Scorpio.
Profile Image for Matt M.
8 reviews
September 3, 2025
I was a huge fan of the frontlines series, this spin off has dragged at points but this was a great addition because of the crossovers from the original series. Looking forward to the next book!
Profile Image for Medusa.
622 reviews16 followers
September 4, 2025
Always a good enjoyable military sci fi experience solidly grounded in plausible scenarios. I almost always buy these before release and with the audiobook too. I can’t really offer higher praise than that. These are reliably good.
35 reviews
September 20, 2025
A new character (in her second book) and slight return of the main character (from the previous series). With a decent story with room for future books - I'm in.

While the there is nothing revolutionary here, it evolves enough to keep me interested.

Frontlines is one of my favorite series and the first two books in evolution have kept me interested in reading more.

Profile Image for Maciek.
236 reviews7 followers
September 21, 2025
Soldier story startup from a different perspective. We get quick training, first mission that goes bad, but shows evolution of Lanky threat. Feels like a mix of original series, but with the stranded colonist vibes. Shows a glimpse where next parts will go to.
3 reviews12 followers
June 29, 2025
I finished Corvus in a single day—classic Kloos: a fast-paced read that felt much more in tune with the tone and structure of the original Frontlines series, which I welcomed.

There’s a strong sense of nostalgia here with the initial chapters echoing Terms of Enlistment. However, the early interpersonal tension—specifically the friction between Archer and Parker—didn’t quite land for me. Unlike other rivalries (eg Malone vs. Eickenberry in Rich Man’s War) this one felt underdeveloped and didn’t meaningfully contribute to character growth or plot stakes.

I also found myself wanting more context; there is a lack of deeper detail on the war’s progression and the SRA-Euro-Pac alliances over the three-year gap in Centers of Gravity. The apparent lack of interoperability and collaboration within the NAC ranks also makes it seem like there hasn't been progress since then as well.

The latter half gets better, though, as Archer and co are put through their paces. The survival sequence from the mining station to the terraformer was gripping and reminded me of Grayson’s trek in Chains of Command. Still, the narrative's emphasis on the "ineffectiveness" of improved hardware felt a bit forced—seemingly inserted to reinforce how quickly the Lankies adapt, but not entirely convincing in execution.

The setup for the next book—with the tease of a new SpecOps division designed for asymmetric warfare using advanced tech—creates immense anticipation as well. The heavy reliance on personal drones during the Alpha Corvi mission felt like a preview of what’s coming, and I’m eager to see how the storyline develops.

I received this book as a Netgalley ARC.
1 review
October 6, 2025

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Profile Image for John Purvis.
1,361 reviews23 followers
December 29, 2025
Marko Kloos (http://www.markokloos.com) is the author of more than 10 novels. Corvus was published last August and it is the second book in his Frontlines: Evolution series. It is the 91st title I’ve completed reading in 2025.

I received an ARC of this book for free through https://www.netgalley.com and I am voluntarily leaving this review. All opinions expressed are entirely my own. Due to scenes of violence and mature language, I categorize this novel as R.

The war with the Lankies has dragged on for seventeen brutal years.

At twenty-two, Alex Archer is a soldier–still carrying the weight of being the only civilian survivor from Scorpio to enlist in the North American Commonwealth (NAC) Defense Corps. Fresh out of the School of Infantry at Joint Base Lejeune, Alex and her closest friend, Private Isa Cressey, are abruptly thrust into active combat. Assigned to the Fifth Regiment, Fifty-Third Battalion, they board the newly commissioned carrier NACS Maine (CVB-80) for a forty-nine-light-year journey to the Alpha Corvi system.

The mission is urgent. A small Sino-Russian Alliance (SRA) colony on the desolate world of Alchiba Three has come under Lankie attack. An SRA carrier had been dispatched with marines to defend the planet, but all communications with it and the colony has been lost. The implication is grim–and Alex and her squad know exactly what likely awaits them.

Alex was only twelve when the Lankies invaded Scorpio. She survived eight harrowing years in the ruins of her world, and the memories still haunt her. Now, those nightmares are about to become reality once again.

Upon deployment to the surface of Alchiba Three, Alex’s regiment quickly confirms their worst fears. Their fleet is attacked almost immediately. Alex’s squad is sent on a reconnaissance mission that turns into a massacre–leaving only four survivors, all newly minted privates barely out of training.

With no officers or non-coms left, and survival hanging by a thread, the others reluctantly look to Alex for leadership. Her hard-won experience as a teen on Scorpio becomes their only advantage. The mission shifts from rescue to survival.

The Corps has evolved to meet the Lankie threat–but so have the Lankies. The enemy Alex encounters on Alchiba Three is faster, deadlier, and terrifyingly different from anything she had seen before.

What began as a rescue operation becomes an all-out fight for survival. Forced into an alliance with surviving SRA marines, Alex and her squad must face the Lankies in a final, desperate battle.

The only question is whether any of them will make it off the planet alive.

I enjoyed the 6.5+ hours I spent reading this 269-page science fiction novel. This novel reminded me a lot of Heinlein’s Starship Troopers. I have had the opportunity to read five other novels by Mr. Kloos, and have thought they all were excellent. Those were Fields of Fire, Points of Impact, Orders of Battle, Ballistic, and Descent. I like the chosen cover art. I give this novel a rating of 4.6 (rounded to 5) out of 5.

You can access more of my book reviews on my Blog ( https://johnpurvis.wordpress.com/blog/).
Profile Image for Chewable Orb.
242 reviews30 followers
August 20, 2025
Corvus (Frontlines: Evolution, #2) by Marko Kloos, Narrated by Arielle DeLisle
(Brilliance Publishing, Audiobook)

3.75 rounded up to 4 🔮🔮🔮🔮 orbs

Alex Archer is a survivor. While most would be impressed, she comes into the military as a bit of an outcast. Her experiences on Scorpio have proven invaluable, although some of the more jealous persuasion might see her as a bit of a know-it-all.

In my first experience in Marko Kloos' frontline series, I left impressed. I have read various space operas and decided to try my hand at a military SF novel instead. For those in the same position, I can highly recommend it. Kloos, while using normal military jargon, never fills us “civilians” with too much. My lack of military knowledge didn’t detract from a fun and lively experience. Perhaps the enemies, Lankies as they are known, gave me those vibes from when I first watched Starship Troopers. No, they aren’t spiders, but what they are is an immovable object hellbent on destroying humans in their wake. Enormous home wreckers in every sense of the word.

This is a situation where a woman escaped the Lankies in her homeland of Scorpio. Devastated by the loss of most of the colony of Scorpio, she enlists in the NAC. Compelled to make a difference, the reader is quick to admire Archer’s leadership skills. Alpha Corvi is in peril, and Archer is sent out along with her unit to investigate. Lo and behold, the Lankies are back, or perhaps they never left. Needless to say, they are stronger than ever.

Since this was the audiobook version narrated by Arielle DeLisle, I must say that the narration was terrific. I felt like I was part of the military practices, getting ready to embark on the unknown. I found this an excellent way to enjoy Kloos's latest work.

I will definitely be diving more into tales from the Frontline series. For me, Kloos has a style of writing that I connect with. I am not sure that I felt as if this reinvented the SF wheel, but what it does, it does extremely well. The story leaves your stomach in knots, as well as giving you that sense of futuristic gumbo that I crave. I would be remiss if I didn’t mention the ending of this particular adventure. Kloos paints a scenario that blew my mind.

Recommended!

Many thanks to Brilliance Publishing for the audiobook through Netgalley in exchange for my honest review.
Profile Image for David.
Author 20 books404 followers
November 20, 2025
I read through all eight books of Marko Kloos's Frontlines MilSF series about Earth fighting a war against the kaiju-sized alien Lankies. The first book was great, the next few were okay, and the end of the series was a dull splat. It really felt like Kloos was just phoning it in with repetitive story beats.

I was kind of glad the series was over, but when he started the Frontlines: Evolution sequel series with Scorpio, I was like, okay, sure, I'll give it a shot.

And it was... okay. The main character was a teenage girl named Alex Archer who was a colonist on a world that got invaded by the lankies. A YA retelling of a Mil-SF story is something John Scalzi did with Zoe's Tale, so I don't begrudge Marko Kloos showing us the Frontlines universe through new eyes.

However, book two, Corvus has Alex back on Earth, grown up, and she decides to join the Space Infantry. So now we're just retelling exactly the same story as Frontlines except with a female main character. Who of course is as ass-kicking as any man because there are no differences between male and female soldiers in the future. Am I little annoyed that Alex's little band of survivors in this story features three girlboss space grunts and the one buffoonish boy is the whiny little bitch? Well, yeah, I am.

Alex and her comrades are stranded on another colony planet where a rescue operation went bad. We're constantly teased that the Lankies are "evolving." Basically they've gotten faster and tougher. I mean, leveling up the boss battles doesn't make them more interesting; in ten books now, we still know almost nothing about the Lankies. They're a gigantic spacefaring species who terraforms worlds and refuses to communicate with humans, and they are more enigmatic than Heinlein's Bugs. I'd have expected by now there would be some hint about their nature, but they're still just big dumb monsters to be endlessly mowed down with heavy weapons.

The writing still felt pretty YA, the dialog was awful, and cameos from our favorite Frontlines characters just made this even more obviously a continuation of the same old series. Will I read the next book? Eh. Kloos is writing formulaic little space operas and they're still kind of fun, but I wish he'd stretch himself or throw some real plot twists.
154 reviews
June 10, 2025
Get ready, sci-fi fans, because Corvus is an absolute triumph! Marko Kloos has done it again, delivering a relentless, action-packed thrill ride that will keep you on the edge of your seat from start to finish. If you loved the original Frontlines series, you're going to devour this one!

From the moment Alex Archer, our incredible protagonist, lands with her new regiment, you're plunged headfirst into an exhilarating fight for survival. The Lankies are back, and they've mutated, making the stakes higher and the battles even more intense. This isn't just a military sci-fi story; it's a testament to mankind's enduring fight against an enemy we've never truly defeated, and it's captivating to witness.

The pacing is phenomenal – once it takes off, it's a non-stop sprint through a desolate, harsh wasteland, forcing Alex and her small group of friends to push their limits. I was absolutely hooked, flying through the pages, desperate to know what would happen next. Kloos masterfully builds suspense and maintains a blistering pace, creating a truly exciting and engaging experience.

And let's talk about the characters! Alex is a compelling and deeply relatable protagonist. Her journey from survivor to hardened military fighter is incredibly well-developed, and her experiences on the Lanky-occupied planet have clearly shaped her into a force to be reckoned with. You can't help but root for her and her unit as they face impossible odds. The interactions within her squad are fantastic, adding depth and heart to the intense action.

This book offers a fresh and unique perspective on the Lanky invasion, expanding the Frontlines universe in all the best ways. There are exciting new developments and tantalizing mysteries surrounding the aliens, keeping the world-building rich and intriguing. Corvus is everything you could want in a military sci-fi adventure: a gripping plot, well-crafted characters, and a universe that continues to evolve and surprise.

Seriously, I cannot recommend this book enough! If you're a fan of high-stakes science fiction, intense survival stories, and well-developed characters fighting for humanity, then Corvus is an absolute must-read. Five out of five stars – bring on Book 3!
Profile Image for Michelle.
656 reviews57 followers
April 27, 2025
Book Two of the Frontlines: Evolution series. The events take place about a year after the first story.

Alex is the MC again. She's enlisted now and is still in training when she's assigned to a rescue mission. The Lankies have invaded a planet full of colonists and Alex's team need to get the colonists off-planet before they're exterminated.

The premise sounds good, but I didn't find this entertaining at all. The writing itself is without blemish; the characters are the reason for my less than hearty endorsement. I couldn't care less about any of them! The reader's supposed to feel sympathy for Alex due to her experiences on the Lanky-occupied planet Corvus. Spoiler alert: I didn't. She just doesn't have any depth to her, and neither did anyone in her unit. It was kind of silly that now she's all of a sudden this hardcore military fighter when she's had so relatively little training. The characters make or break a story for me, and these characters had the depth and complexity of paper plates. The only times that I enjoyed this book were due to an occasional cameo from some of the characters from the previous series. Oh, and there were some new developments and more mysteries surrounding the Lankies, so that was another plus. Other than these things, it just wasn't engaging at all.

It didn't help matters that the plot didn't begin to become lively until 38% in. The pacing needs work. There is so, so much talking and rehashing of events from Scorpio. It was a bit much.

This author can write some darned good stories with decent characters, as he did with the original Frontlines series. I've reread that one and love it. This spinoff series just isn't working for me, though. The book was well-crafted even though the content was just fair, so I'd rate this maybe three and a half stars, rounded down.

This ARC was provided by the author and NetGalley. I wish that both the reading experience and this review had been favorable.

1 review
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December 10, 2025
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96 reviews1 follower
August 20, 2025
Fair tale but has the common flaws

Former soldiers have advantages when writing military dialog. Protocol, terminology and nature of topics are fluid. Most of the time upgrading terms appropriately is not a problem. However, after setting out huge differences in alien abilities, old military types tend to fail badly at adjusting combat descriptions.

Even after inserting statements that the scale of actions needs to change -- they fail to apply simple math. They crank out the same or nearly the same distances and timing they learned for fighting humans in their real service. Specifically Lankies moving near 50kph will cross 400 meters in around 30 seconds. So no way 6-7 reloads with aimed from man carried recoilless rifle and have last enemy killed 50 meters short.

But maybe the authors all have their brains thinking in movie script mode trying to seduce producers. Because even serious live action movie stuff is framed like Bugs Bunny-Warner cartoons when the action zooms into close combat. All to convey emotion to the audience. The giants or dragons fantasy stuff is often hilarious as the scale of size, distance and power accordions back and forth if you think about it. And that is what the problem is here too. At least it's in the serious live action area where it's just cutting boring closing distance and extending the interesting time...with maybe a few losses of continuity that are lost in all the action.
Profile Image for Ryan Beck.
7 reviews2 followers
July 19, 2025
Just finished Frontlines: Evolution Corvus by Marko Kloos. We join Alex Archer after her reintegration into the world following the events of the last novel. Her experiences on Scorpio drive her into the NAC Defense Corps and we join her in the midst of her training. We hit some familiar military SF beats before we’re thrown into the action in Alpha Corvi. The situation quickly devolves and soon Alex and her squad are placed in the most dire of circumstances.

Corvus throws us firmly back into the familiar territory of the original Frontlines novels. But now we get a fresh new perspective from a boots-on-the-ground character driven by something other than a desire to leave the PRCs. Instead of characters trying to escape their past, we have one trying to honor it. Kloos has moved away from the first person POV, but still gives us an intimate look into what drives Alex and her decision making. Scorpio and Corvus combined feel a bit like a Terms of Enlistment reboot. We’re in a familiar place with a familiar plot structure, but with different characters and a fresh perspective (and a few familiar faces sprinkled throughout). The enemy has evolved and now our heroes need to as well. I’m excited to see where this all goes.
3,970 reviews14 followers
August 25, 2025
( Format : Audiobook )
"Strap in tight and hold on."

When Terms of Enlistment, book one of the Frontlines series, narrated by the most excellent Luke Daniels, was first available on Audible in 2014, I immediately became a fan.of author Marco Kloos and have subsequently followed each Audiobook as it came out, always waiting with considerable anticipation. And Corvus was no different.
It was well worth the wait, following Alex as she again faces the fearsome Lankies, this time on a planet not her own. My only complaint, but it is a big one, is the dreadful voice of the narrator Arrielle DeLisle. With another author I could have abandoned the book (as my husband commented on hearing her reading, "How can you listen to that?") But it wasn't another author, and Kloos'story with the ongoing personal development of both Alex and the survival struggle of humanity easily won out.

Highly recommended as a most enjoyable SF military story. It could stand alone, but why not first enjoy book.one of the Frontlines:Evolution series which tells of how Alex first became involved. Or, better yet, be transported to the arrival of the Lankies and the subsequent battles, with the original Frontlines series?
132 reviews1 follower
August 29, 2025
5 for what it is - action, can't put down, adventure with new "twists" and familiar faces. was a super fun and quick read.
3 for pushing forward the deeper more interesting facts/theories about Lankies.

But let down by, after a dozen or so Lanky books, we still can't get any insight or theorizing behind the curtain of who the Lankies are, how they develop, what Intel thinks of their purpose and intentions.

They are a vet alien alien. Which makes them fun. But the continued "war of the worlds" style lack of information is frustrating. The "I'm a grunt and this is beyond my pay grade" to chatter is tiresome. It seems like we MIGHT be moving forward in to a new way of thinking... But there have been so many clues as to what and how the Lankies are that it's about time we start putting that in a central place (like how they likely use human bodies, organic material, to grow their seed ships from the earth they are in, and that's why they come out in different colors - red out of Mars, dark brown from Corvus). And that would make sense hwy they target planets human are on vs simply having their own bc they new organic material to spawn.

The last Grayson books had so much potential to theorize on their nursery rogue planet, but they never did ...
Profile Image for Joseph McRae Palmer.
Author 19 books14 followers
September 7, 2025
Kloos has always been a strong writer, and Corvus is no exception. His prose is clean, immersive, and easy to sink into, with a knack for making the world feel tangible. I also found myself connecting strongly with the main character, Alex. Her perspective and struggles are well-rendered, and that emotional core kept me invested even when the plot faltered.

Unfortunately, the story itself moves at a sluggish pace. Many passages get bogged down in overlong descriptions of what’s happening, which left me skimming at times. The tension, too, is uneven. Compared to other entries in this universe, the aliens here don’t come across as particularly dangerous, and that lack of menace makes the stakes feel lower than they should.

The ending is one of the book’s high points. It’s compelling, with a solid hook that clearly sets the stage for follow-on novels. Still, it almost feels as if the entire book was just a slow build toward that hook, leaving the journey itself less satisfying.

Overall, Corvus is well-written and has flashes of the gripping tension Kloos is known for, but it struggles with pacing and payoff. A worthwhile read for fans of the series, but not one of Kloos’s strongest entries.
49 reviews4 followers
August 25, 2025
The spinoff is finally picking up speed, turning this series into an auto-buy whenever a new novel releases. If you like Kloos' previous books, this one will not disappoint.

That being said, for all my fondness, I wish there was more polish. Many points are re-iterated over and over again, especially when it comes to the thoughts of Alex. The circumstances of her upbringing are repeated several times, like how she admired the soldiers, how her situation became normal, how routine and duty became part of her character. The dialogue between the Privates is giving me serious "How do you do, fellow kids?" vibes (=young people dialogue written by middle-aged person) with many of the jokes falling flat.

Also, still not convinced by the audiobook Narrator. I know the Privates are supposed to be young and inexperienced but the Narrator turns them into what sounds like YA novel 16 year olds. Also, for some reason, at times her male voices have odd pauses and the exchanges sound too slow, as if drunk. Makes me really miss the bright, snappy narration of Emily Woo Zeller from Freeze Frame Revolution which could turn to hard edged in a heart beat.
Profile Image for Justin.
495 reviews21 followers
August 21, 2025
The story of Alexandra "Alex" Archer continues. At the end of the previous book, she has enlisted in the NAC's Spaceborne Infantry. This goes through her training and her first deployment. Like the first book and many other "Frontline" books, Alex is caught behind enemy lines with little hope of survival. She makes a new friend and reunites with a SRA unit that Andrew had met before.

Andrew Grayson is now a lieutenant colonel (OF-5 in NATO parlance) and thus appears only as a cameo at the beginning and the end of the book. Most lieutenant colonels don't go into battle and on the frontlines. Instead, they direct the battle and start new units to take the war to the enemy. Thus, this book is all about Alex and her battles.

They learn more about the Lankies which is not much. I'm not sure how much the author will reveal more about these aliens and how they operate in the future. There is intelligence and cunning but not much more.
6 reviews
November 16, 2025
This is my first negative review of a Marko Kloos novel, and I must admit I was unable to finish the book. As a parent myself, I have limited reading time, and this one proved to be a particularly difficult read.

One of the core issues, for me, was the portrayal of the main character: I felt as though she was more like a stand-in for the author’s own daughter, rather than a fully independent character. This book departs from the familiar framework of Kloos’s Frontlines series, instead of grizzled veterans and hard-earned maturity, we meet idealized figures: stoic male mentors, emotionally sensitive, hopeless young men, and women who excel at everything they do(the notions of a boomer).

To me, the shift reflects a strong undercurrent of “wokeness”, and a stronger main character would serve the customers of this book better. The previous book (same female lead) was much better than this.

Profile Image for William (Mr. Bill) Turner.
435 reviews7 followers
September 3, 2025
Corvus (Frontlines Evolution Book 2) - exciting & creative

In this follow-up book to 'Scorpio' by Marko Kloos, the action is even more exciting. I like military action, especially against an invasive species like the Lankies. 'Corvus' introduces several very creative situations to the newly vetted recruits of the Spaceborne Infantry. It was difficult for me to put this book down. Thankfully, there is an audible book performed by Arielle DeLisle that captures all of the excitement of the excellent writing by author Marko Kloos. I do caution you that, like many military adventure books movies, the profanity far exceeds the need. And, like 'Scorpio,' the lead character is female. Just be aware if you play the audible version, be aware of your surroundings. -Mr.Bill
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