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Know your enemy like you know yourself.

Andrea Tolliver and her friends are now Imperial Marines, sworn to protect the Terran Empire from all enemies. Too bad she hasn’t even had time to make friends in her new unit before civil unrest sees them deployed.

Once is happenstance. Twice is coincidence.

Separated from their unit, they must discover who is really behind the unrest and stop them by any means necessary. When the enemy strikes from the shadows, they must stand and fight. If they fail, the Empire will never be the same.

Three times is enemy action.

365 pages, Kindle Edition

First published February 22, 2022

73 people are currently reading
21 people want to read

About the author

Terry Mixon

87 books298 followers
#1 Bestselling Military Science Fiction author Terry Mixon served as a non-commissioned officer in the United States Army 101st Airborne Division. He later worked alongside the flight controllers in the Mission Control Center at the NASA Johnson Space Center supporting the Space Shuttle, the International Space Station, and other human spaceflight projects.

He now writes full time while living in Texas with his lovely wife and a pounce of cats.

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5 stars
323 (71%)
4 stars
103 (22%)
3 stars
23 (5%)
2 stars
3 (<1%)
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0 (0%)
Displaying 1 - 24 of 24 reviews
Profile Image for Aaron Anderson.
1,299 reviews17 followers
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September 28, 2022
I won't rate this book because I didn't hate it that much. I typically don't rate books I don't finish, unless I either almost finished them or they REALLY made me mad.

I think I've just read too many books with schools or military training where Everybody Is Against You. Once she got on base, I thought about what most of the rest of the book would be, and I just got tired. I couldn't muster the desire to continue.

I'm not precisely sure what it is about a school or your own military being against you that seems so stale to me. I often am fine with the whole world being against you (metaphorically), but something about the enclosed areas of a school or your military training just annoy me.

Plus, the feeling that they should, at least theoretically, be on your side. I know real life is often filled with people who should be on your side that aren't, but this is one thing that I'm tired of in fiction.
1,185 reviews17 followers
March 9, 2022
Great book, good characters, fast paced story, want more

I love this book. I don’t give a lot of books a five, in fact the last book I read by this author I only gave two stars. This book was great, fast paced, a great set of characters, great sci-fi technology and an interesting plot. What I don’t like is this authors propensity for having his readers wait a long time for another book. Please Mr. Nixon do not keep us waiting for the next installment in this series. Everyone should give this series a try. You will love the characters, just hope we don’t have to wait two years for the next book. If so I will have to go in and re-appraise my review.
Profile Image for Jay A.  Aulds.
124 reviews1 follower
April 19, 2022
Enemies everywhere when it comes to the Singularity

Andrea and her comrades managed to enlist along with Delta Company to a world to dissolve a dispute and yet they all wonder what's truly going on Just love the mysteries, y'all!
Of course, Andrea endures more discrimination to her genetic issues but she perservere through it all with the help of Diana and Cladius.
I love how the platoons slowly open to the idea of having a former Singularity person in their groups and even managed to impress some of the heavy hitters.
Also like how Andrea gets to prove herself not only in the mental but in marine spirit.
Hoorah!
Author 7 books3 followers
February 25, 2022
This will long be one of my favorites by Terry Mixon. The characters felt natural, the premise and location believable, and it was a great story line about learning to fit in. If you're a fan of Terry's writing, you'll like it too.

There's a lot of action, well developed characters and a plot that kept my attention to the very end. He created a world enough like Earth that I felt right at home. This is what life will be like when we colonize other planets. We'll make them feel like where we came from. I hope there will be people with the values that Terry puts in his characters when we do.
25 reviews2 followers
February 26, 2022
Terran Imperial Marines in action

This is the last in a three book series about Andrea Tolliver, a genetically modified human. Rescued from the cruel Singularity as a 12 year old, she later joins the Imperial Marines and proves that she has what it takes. Not only that but on her first deployment she is instrumental in foiling a Singularity plot to gain a major advantage over the Terran Empire. The action is fast paced, the plot well conceived and the characters believable and appealing. The three books are a very good read.
721 reviews2 followers
April 25, 2025
Pity it's the last one

The storyline has so much potential to take it further, yet this appears to be where it stops
It's well constructed, evenly paced with a fair bit of intrigue to keep you interested.
Andrea manages to become a marine, along with her friends and what should be a dull quiet mission turns into anything but.
What's disappointing is that so many threads are put in place in the last couple of chapters for future stories, yet after 3yrs nothing has come of them
Hopefully the author has a rethink, this series really does deserve more
Profile Image for Craig.
41 reviews3 followers
March 1, 2022
Great next part of a very satisfying story arc

I am finding Terry's exploration of what it is like to be a stranger in a strange land to be especially relevant in our current divided communities, states, and nations. Marked like Cain, there is no mistaking Andrea's heritage. Can we see past to the person?
1,117 reviews9 followers
March 6, 2022
Great Read!

Why can’t more authors write like this?

The story was a pleasure to read, and I could not put it down and finished within a day.

The story just flowed reading. No dead spots in this book you have to plow through.

Great story and added a lot of development to Andrea. The ending fight climax was over the top and a joy to read. Great one liners! Excellent ending.
19 reviews
March 12, 2022
Enemy action is…

Brilliant, needs to be read, gripping and probably much more. This is a great saga and told in the words of a great story teller. If you have read Empire of Bones saga you will understand how this fits in to that timeline. There is so much I could say and possibly spoil it for you so simply put just read it, you won’t be disappointed.
82 reviews1 follower
March 2, 2022
Another great book

My only complaint is this author writes these great books too slowly. I will probably have to reread the first two books in this series to refresh my memory on the backstories. Really good book.
Author 1 book1 follower
March 10, 2022
FAR better than I expected!

I picked this series up to waste some time, not really expecting alot. BOY! Was I wrong! Fascinating short and long story lines. Military culture and attitude well captured. Just a lot of fun to read. Waiting for the next one!
7 reviews
March 15, 2022
Imperial Marines, with added intrigue!

The Imperial Marines saga heats up, with some very interesting developments both hidden and in plain sight!

Really looking forward to the future of this series!
Profile Image for William Jerkins.
158 reviews2 followers
Read
March 18, 2022
Still on of the best!

I loved the empire of bones. Story. Andrea was mentioned in that series a couple of times. Now that I have read her begining. I can see her there keeping the 3mpire safe. Really good story.
3 reviews
April 16, 2022
words cannot express!

This story should not end here. Whereas I read about a book every 3days and have done so since I was 13-14 (I am 70 now) when I say this series was one of my favorites! Rates up there with Asimov. Thank you Mr Nixon, just thank You!
106 reviews2 followers
May 31, 2022
Wolf

I have really enjoyed reading Enemy Action the third story of The Imperialism Marines Saga. I fill you have finally found a place for Andrea to call home. I look forward to finding out where you take her and her fellow marines next.
2 reviews
February 13, 2023
Typical Terry Mixon--AWESOME!

I just devowered these three books in the Imperial Marines Saga.
I didn't realize it takes place in the same universe as the Empire of Bones series until a Marine Rader character showed up. Great fun!
4 reviews
October 7, 2025
Oorah! Marines!

In the best tradition of Space Marines. Intelligence, Courage, and Violence of Action. With a cast of characters whose next adventures I look forward to hearing all about.
33 reviews
March 3, 2022
love it!!

I’d have to say I love all of Terry’s works but the Andrea story is my favorite of all his series. Can’t wait for number 4!!
Profile Image for DAVID.
583 reviews5 followers
March 7, 2022
Cracking Story

Totally enjoyed this storyline after waiting patiently for it to come out lol. Really looking forward to the next story. Well worth 5 stars
54 reviews
March 15, 2022
Great story!

I have to admit that I do love this guy's writing. I've read just about every single book that he's written and enjoyed them all.
565 reviews1 follower
April 30, 2022
Good ending

Love a good party with gifts and horseplay. Trilogy or not this is a good setup for an exciting universe with villains and heros galore.
3 reviews1 follower
May 8, 2022
Good read

Very good makes it hard to put down. Keeps you interested in how she can stay out of trouble and still be herself.
Profile Image for Kwame Opeyo.
Author 5 books1 follower
December 1, 2022
Intriguing

This is the third book in the series in have read. It just.gets better each book. Now onto number four!
72 reviews
November 22, 2023
Excellent character progression

A young girl being raised as a leader on a ruthless society develops, and ages with great pilot twists and action.
Displaying 1 - 24 of 24 reviews

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