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Training done, healing complete, Desmond is positive that it’s time to return to ‘life as usual’ with his guards. Sure, he’s got a trio of nearly several-hundred pound alien guard animals that believe they are lap-sized, a whole new world of power to explore as an adept, and a brand new posting as an officer. But all that is nothing Desmond can’t figure out.

Especially after his team helped disassemble a drug ring pushing a new and lethal drug to a planetary colony that was having lethal consequences amongst the users. That’s not even counting the repeated missions to handle cult activities and uncover members of said cult.

Surely, a nice, quiet few years doing paperwork and Arsenal doing their everyday job—diving into magical Rifts in space to kill the monsters inside and stabilize the tear in reality before it exploded—would be simple enough to ask for. Even if he’s being assigned to the adept-lieutenant position aboard a fleet dreadnought—a post selected for him by a member of the special enforcement organization in the Hegemony, the Imperial Questers.

Fate should give her favorite squeaky toy a rest, shouldn’t she?

*** Monster Girls In Space is a Sci-Fi, fantasy, semi-military, men’s romance, progression fantasy about a man becoming a space-wizard amongst a universe full of monster girls (it’s in the title, you should have expected that part). Expect adventure, mischief, magic, fighting, and romance in a galaxy that is curious what sort of mischief Humanity will get up to.

497 pages, Kindle Edition

Published October 13, 2026

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M. Tress

47 books130 followers

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5 stars
414 (77%)
4 stars
94 (17%)
3 stars
20 (3%)
2 stars
3 (<1%)
1 star
2 (<1%)
Displaying 1 - 30 of 31 reviews
27 reviews
October 16, 2026
While summarizing the story is always a bonus this far into a series. . . I felt it went on for what six, seven chapters? I still read every word, but as another tip, there is a glossary / character list at the back of the book, in case anyone needs a refresh. So the overlong overview could've been condensed.

Des is still fates' squeaky toy, and we love him for it. His efforts to date are continuing, some paying off, and some overarching themes are starting to tie up. The heart of the series is Des and his girls, supporting and watching out for each other, and all are happy to be back in adrenaline fueled adventures.

Let me firmly say, there's nothing more annoying than a 'dreamy' voice. I pictured a rift take down and this annoying slow drawling sleepy voice somehow alerting Des. . . In a soft tone and wondered how it was heard over bombs exploding, gunfire, and the monster's dying cries. And if we didn't forget, everytime MONA spoke, the word 'dreamy' came with it. I remember Saul back at the academy went thru a few voice changes before Des settled on one, so yeah MONA needs an adjustment. Honestly, the sentinent AI's are oddly weird from previous books. OBIE was so matter of fact. The Resolute Vanguard has a peppy cheerleader voice.

There were things I missed from previous books, like Des's healing. Movie nights with the crew. Just the conversations around the crew and introducing them to games, customs, and fun. The obstacle course was a highlight but I didn't understand why it wasn't made into a permanent training room. But thru most of this book Des was lost in his head, dealing with worry, waiting, and random thoughts. Pivotal Proof was oddly put together this time around.
Profile Image for Joshua Pickering.
15 reviews
October 24, 2026
Love the series but this book ain't it

I have read multiple books by Tress and love them but Spoilers!



This was just a book of filler and ironing out plot to set the scene for future books and to be honest was very disappointing for a book i have been looking forward to.
I hope Tress gets on with it, less filler and more actual content. While the banter, touching on the feelings and emotions of each of his companions is important, we are 9 books in we understand thr dynamics and don't need to revisit these interactions constantly.

New characters are introduced fantastically and the characters have so much personality, and you can visualise so much of the story, but there needs to be story to go with it.

I hope going forward this story is more condensed, the story develops more and action happens. Not your best work Tress, while I don't want your writing to change too much because you are a fantastic and unique flavour please take a little of this on and progress things.
100 reviews2 followers
October 13, 2026
It just keeps getting better

Honestly I'm not even sure what to write anymore, other than what I stated in the subject line. Desmond keeps growing, the story is as interesting now as it was at the beginning and the writing is outstanding. I have kept a patreon membership with only two authors on a continuous basis m. Tress being one and the author who's series was mentioned in this book. Both have the rare talent to write a series longer than 3 books and keep the story just as amazing in book 9 as it was in book 1. Now for the sad part. Unfortunately due to the author writing multiple series at once we will now have to wait months again before the next book in this series begins. The good news is there will be a next book. Honestly this series at this pace could probably go on for 20 or more books and never get dull. I'm sincerely hoping it does lol. Anyway it's awesome as always. Can't wait for book 10.
Profile Image for GrumpyOldMan.
642 reviews46 followers
October 29, 2026
This was a pretty good book in a really good series. I think the only downsides are how much mundane stuff the reader has to go through, especially around the "space doggies" aspect that takes up a considerable amount of space.

I think the harem at this point is very stable, and it is unlikely in the extreme the MC will add any future LIs to the mix. The plot is starting to cycle around a different galactic body than the one the MC and Earth has joined, and is related to one of the MC's LIs.

I'd like to see more Rift encounters and less content with the space doggies, but that's my pet peeve with this series. I will still read the next book.
10 reviews
October 14, 2026
Brilliant as usual

Hoping it will not be long until monster girls in space 10. Unlike Moston space series the universe building continues alongside the plot and character building and all three continue to be unbelievably good. If you love a fascinating plot, interesting characters and a believable and intriguing universe you are unlikely to find a better series. I am over 60 and have read two that match it. I also read at least one of book every two days most of the time.
65 reviews
October 24, 2026
A well written and entertaining book but its all foreplay and no climax (apart from that one chapter where this are multiple climaxes ;-)
Each engagement starts off well but there is no ending, each battle or encounter just petters out without a resolution. The murder mystery, no result. The rift delves start out busy with good combat but the endings just fade to black. Even the "main" hunt just ends with nothing happening beyond "political shenanigans".

An enjoyable read but lacking in action. More of a slice of life story than an action one.
Profile Image for Joseph Bottoms.
25 reviews1 follower
October 14, 2026
fantastical Sci-fi fantasy joyride!

I absolutely love these characters Their interactions, success’s and failings all make them for a better word more human even though most are not of Terra! Can’t wait to read more couldn’t put it down loved every minute of it. If you love space different species interaction and tons of action this series is for you not suggested for young readers 18+ .
84 reviews1 follower
October 16, 2026
love the series

I lose track of time each time I pick up a book from this series. The characters are well and truly fleshed out and the book gives each of them their unique chance to shine. Though the best part imo is how the world doesn’t revolve around the mc, things are always moving in the background and we can see snippets of that in the beginning of each chapter, which I always look forward to.
5 reviews
October 19, 2026
Book 9 of the "folkverse"

Once again a fun story, but for some reason, everyone in the known galaxy only uses the word "folk" instead of "people". It's used no less than fifty times in the book, not to mention every other book in the series. It really took me out of the story and made me visibly cringe at times. Apparently this universe M. Tress is writing is full of the folksiest folks that ever folked. Perhaps a thesaurus could be used in the future?
Profile Image for Dannan Tavona.
1,168 reviews15 followers
October 14, 2026
Another advance in a star spanning saga

Alternate universe, interstellar civilizations, magic, military life, harem adult situations

Desmond and his wives, after recovering from saving the Baroness and saving her government, get their first command assignment. Excellent editing. Love the series and the distinct characters.
Profile Image for Jason Houlden.
161 reviews
October 15, 2026
Masterfully Done Story

This is my favorite series in the last 5 years. It just keeps getting better and the main characters just keep it real. I like the way it flows and the way that it does a good job of tossing you into a weird but still believable universe. I also have liked all the intrigue that has happened with this series thus far.
76 reviews
October 15, 2026
Meandered A Bit

This book spent a lot of time not moving the overarching plot forward, but I'm not complaining (much). It was more of a "groundwork" book?

Anywho, the resolution with Whitton, the introduction of MONA, and the admission of the questions about Desmond's loyalty from the powers that be all seem to bode well for the future of the series. Looking forward to it.
1,593 reviews17 followers
October 16, 2026
One of my favorite series!!!!

As always an outstanding science fiction adventure series!!! The author has stayed true to their characters and the world they introduced us to in the beginning!! The US finally making a decision and the future of humanity in space was expertly written!!! More more more
221 reviews4 followers
October 17, 2026
Awesome entertainment.

I love the characters and the story is compelling and exciting. It’s great fun to see how the characters have grown and expanded during this series. Also, as usual, it is exciting to see a new book come out and just as sad to have it come to an end. Can’t wait to read more!
94 reviews
October 21, 2026
1 book down, 91 to go! (hopefully)

Best mongirl series on kindle. Fantasy, scifi and harem written WELL. My only real complaint is how slow these books are coming out, but that's an issue with my reading speed vs the Author's schedule. Regardless, 5 stars and I hope they have at least 20 books outlined for this story. Here's to many sales, and the next book!
135 reviews
November 1, 2026
Pivotal Proof we have a winner

Its time to get back on the horse. We are finally off medical leave and on to a new ship. We get introduced to a new boss and crew here and while the boss is memorable the new subordinates didn't leave much of an impression. A new mystery is a foot which seems to be heading in an exciting direction. Cant wait for the next book.
350 reviews5 followers
October 14, 2026
A good read

Was too short. I was happy with the pace and found the story moving in a interesting direction. I find the characters easy to relate to and I desire for them to succeed. A great series that I enjoy. Thank you for your hard work
242 reviews1 follower
October 15, 2026
Outstanding Story

Wonderful world building. Delightful characters who grow and develop, multiple plot lines and consistent rules. Highly Recommend!! 10 out of 10
Looking forward to seeing the next installment. Great read.
5 reviews
October 15, 2026
Good Storyline

The book easily merged from the previous edition seamlessly. It has enhanced the the main characters progession and is open ended for a continuation of an excellent series
69 reviews
October 16, 2026
ugggg I read this in one day!!!

Ugg I read this in one day and now have to wait for the next book of the series!!! As usual this book was amazing and his descriptions of the “earths” politicians are great!!! Can’t wait for book 10!!!
Profile Image for Michael Baez.
70 reviews1 follower
October 16, 2026
Oh the set up is on point

Master stroke set up. A war with his technical mother in law, the homeworld finally getting their heads out of mainstreet and the slow careful understanding of mana growing. I need the next book, the wait is actual legit torture at this point :D
57 reviews1 follower
October 19, 2026
Pretty good

This is not my favorite book so far of this series but it's pretty good. I've enjoyed it. It moves the story along nicely and has some interesting moments. The sevrax are cute af though. They made the book for me.
Profile Image for Andrew Riley.
291 reviews2 followers
October 29, 2026
Brilliante

Another brilliant book in the series. Really lol forward to reading more of the books as there's always a good mix of action and character building, with a good bit of story progression to.
Profile Image for Scott.
36 reviews7 followers
October 15, 2026
Des and the girls are still going strong

Another wonderful trip with Desmond and his crew! I really enjoyed his new posting and the hints of things to come
Profile Image for Michael Burnett.
1,332 reviews9 followers
October 15, 2026
Great book

Great book I can't wait to read the next book in the series I would recommend this author to anyone
958 reviews11 followers
October 15, 2026
Very good book

This is a fine fantasy harem adventure novel. It is well written and edited. I especially like Monika Irongrip. I anxiously await the author's next novel.
31 reviews
October 15, 2026
I love this series. Great world-building, character development, and inter-relationships inside and outside the central family characters.
47 reviews
October 18, 2026
so good

Give me more of this. Absolutely fantastic just read the book already. Great addition to the series, good character building.
413 reviews4 followers
October 18, 2026
Great book!

I hope to read many more Monster Girls in Space books, they are always super interesting! Great book, awesome characters, cool story!
23 reviews
October 19, 2026
keeps rolling along

the story keeps rolling along. this one felt shorter than it was. sets up a lot though. awaiting the next one to travel in.
Displaying 1 - 30 of 31 reviews