Picked by The Synchronicity War fans

Here are 9 books that The Synchronicity War fans have personally recommended once you finish the The Synchronicity War series. Book DNA is a community of authors and super-readers sharing their favorite books with the world.

Book cover of Junkyard Cats

Matthew O. Duncan Author Of The Warrior's Stone

From my list on old-school sci-fi from 21st century authors.

Why am I passionate about this?

I grew up a fan of all things sci-fi, Star Wars, Star Trek, Battlestar Galactica, and so on. But the older I got, the pickier I got, wanting more depth in character, creative stories and fun, but believable action. I read classic sci-fi like iRobot, Starship Troopers, and Enders Game, to name a few. I did find some contemporary authors I liked like Marco Kloos, Detmare Wehr, and Rebecca Branch, but they were needles in a haystack. So, instead of complaining that there were not enough good books out there, I started writing my own. A decade later I have 8 published titles and more on the way.  

Matthew's book list on old-school sci-fi from 21st century authors

Matthew O. Duncan Why Matthew loves this book

This is a good book, not great, but good. But I do recommend it to anyone who is interested in writing sci-fi. I love old-school sci-fi with the exception that it doesn’t always portray women in the best ways. Sci-fi has done better than most genres in making room for strong female characters, but not strong women writers. So when a talented writer like Faith Hunter writes a book with a female character who kicks ass and holds her own amongst the male heroes and villains, we should take note. It’s one thing to have a strong female lead written by a man (I try to make my female characters equals in my books), but if you want to study how to write believable strong female leads, then you should seek out writers like Faith Hunter.  

By Faith Hunter ,

Why should I read it?

2 authors picked Junkyard Cats as one of their favorite books, and they share why you should read it.

What is this book about?

From the author of the best-selling Jane Yellowrock and Soulwood series comes a tough new heroine who is far more than she seems. Junkyard Cats is the first in a new novella series.

After the Final War, after the appearance of the Bug aliens and their enforced peace, Shining Smith is still alive, still doing business from the old scrapyard bequeathed to her by her father. But Shining is now something more than human. And the scrapyard is no longer just a scrapyard, but a place full of secrets that she has guarded for years.

This life she has built,…


Book cover of Hey Alexa: A Contemporary Romance Set During the Pandemic

Matthew O. Duncan Author Of The Warrior's Stone

From my list on old-school sci-fi from 21st century authors.

Why am I passionate about this?

I grew up a fan of all things sci-fi, Star Wars, Star Trek, Battlestar Galactica, and so on. But the older I got, the pickier I got, wanting more depth in character, creative stories and fun, but believable action. I read classic sci-fi like iRobot, Starship Troopers, and Enders Game, to name a few. I did find some contemporary authors I liked like Marco Kloos, Detmare Wehr, and Rebecca Branch, but they were needles in a haystack. So, instead of complaining that there were not enough good books out there, I started writing my own. A decade later I have 8 published titles and more on the way.  

Matthew's book list on old-school sci-fi from 21st century authors

Matthew O. Duncan Why Matthew loves this book

I was once told; the best authors are the ones who read more than they write. To that end I don’t always stick with my favorite genres. This book was recommended to me by a friend as a sci-fi that I typically would not read because it’s also a romance book. Hey Alexa, is slightly in the future, when Amazon develops an evolved version of Alexa that exists in a beautiful female android. I don’t want to give any more away. What makes this book wonderful is the journey the two main characters take in discovering that love is as unique as each individual person and it can be found when we are open to it.  

By Rebecca Branch ,

Why should I read it?

1 author picked Hey Alexa as one of their favorite books, and they share why you should read it.

What is this book about?

He's brilliant, accomplished, and alone. He's been handed a death sentence by his doctor, and his only friend is his clock/radio. Can the Echo Dot with Alexa's voice save him?Travel to New York, London, Paris, Rome, Florence, Berlin, and a villa in Tuscany, as the man who'd given up on life finds a hopeful future and a partner to love.


Book cover of Renegade Star

Matthew O. Duncan Author Of The Warrior's Stone

From my list on old-school sci-fi from 21st century authors.

Why am I passionate about this?

I grew up a fan of all things sci-fi, Star Wars, Star Trek, Battlestar Galactica, and so on. But the older I got, the pickier I got, wanting more depth in character, creative stories and fun, but believable action. I read classic sci-fi like iRobot, Starship Troopers, and Enders Game, to name a few. I did find some contemporary authors I liked like Marco Kloos, Detmare Wehr, and Rebecca Branch, but they were needles in a haystack. So, instead of complaining that there were not enough good books out there, I started writing my own. A decade later I have 8 published titles and more on the way.  

Matthew's book list on old-school sci-fi from 21st century authors

Matthew O. Duncan Why Matthew loves this book

This book is a little more Space Opera than Sci-fi as it focuses more on the adventure than the impossibility of the technology. It takes place thousands of years in the future when man kinds had spread out across the galaxy and forgotten about Earth, for the most part. The characters are not deep, and the story relies more on action than complexity, but it’s fun. It moves from one event to another, the main character is a bit of a rogue that you can’t help but like and his female counterpart is smarter, faster, and deadlier than he will every be, so it's good she is on his side. One of the reasons I like these books (10 book series with some spin-offs) is because it is very different from my style. If my books were Angus Steaks, these would be an Ice-cream Sunday.   

By J.N. Chaney ,

Why should I read it?

1 author picked Renegade Star as one of their favorite books, and they share why you should read it.

What is this book about?

They say the Earth is just a myth. Something to tell your children when you put them to sleep, the lost homeworld of humanity. Everyone knows it isn't real, though. It can't be.

But when Captain Jace Hughes encounters a nun with a mysterious piece of cargo and a bold secret, he soon discovers that everything he thought he knew about Earth is wrong. So very, very wrong.

Climb aboard The Renegade Star and assemble a crew, follow the clues, uncover the truth, and most importantly, try to stay alive.

Experience the beginning of a sprawling galactic tale in this…


Book cover of Terms of Enlistment

Anthony Riches Author Of Wounds of Honour

From my list on insight as to why men go to war.

Why am I passionate about this?

I’m pretty well qualified to provide you with a list of five great books about men at war because, frankly, I’ve spent half my life reading them and the other half trying to write them (you be the judge!). My degree in Military Studies was focused on the question of what makes men endure the lunacy of war (whether they be ‘goodies’ or ‘baddies’), and it was in fiction that I found some of the clearest answers–clue: it’s often less about country and duty and more about the love of the men alongside the soldier. In learning how to write, I also learned how to recognize great–enjoy!

Anthony's book list on insight as to why men go to war

Anthony Riches Why Anthony loves this book

If the other four books I’ve recommended are founded in grim reality, this one’s that guilty pleasure that an ancient world author might not want to be caught reading. But, if war is a timeless and undeniable fact of human existence—and it seems to be right now—then Marko Kloos’s story of men and women at war in the 22nd century, with an enigmatic alien species as the enemy, is pretty much timeless, too.

Yes, there’s a high-tech kit, but it’s never the McGuffin, and the same themes as ever—duty, honor, and the planet—come to the fore. Easy to read but never lazy, I found this series as gripping as the others. If you (like me) read a lot of historical fiction but have a soft spot for sci-fi, then this is about as highly recommended as they come.

By Marko Kloos ,

Why should I read it?

4 authors picked Terms of Enlistment as one of their favorite books, and they share why you should read it.

What is this book about?

"There is nobody who does [military SF] better than Marko Kloos. His Frontlines series is a worthy successor to such classics as Starship Troopers, The Forever War, and We All Died at Breakaway Station." -George R. R. Martin

The year is 2108, and the North American Commonwealth is bursting at the seams. For welfare rats like Andrew Grayson, there are only two ways out of the crime-ridden and filthy welfare tenements: You can hope to win the lottery and draw a ticket on a colony ship settling off-world . . . or you can join the service.

With the colony…


Book cover of In Death Ground

Dietmar Arthur Wehr Author Of Phoenix Dawn

From my list on military SF books that are impossible to put down.

Why am I passionate about this?

I’ve had the urge to write stories as far back as public school. And despite encouragement from a creative writing teacher in high school, my first career ended up being corporate financial analysis. By the time I reached 59, I was (a) unemployed and unemployable (due to age) and (b) in a relationship with a wonderful woman who loved science fiction and was very creative (a former art teacher). With her encouragement, I finished my first SF novel at just the right time to benefit from the explosion of interest in reading ebooks bought on Amazon. I’ve now written 37 novels.

Dietmar's book list on military SF books that are impossible to put down

Dietmar Arthur Wehr Why Dietmar loves this book

I like to read stories that involve strategy and tactics, and this book has plenty of both. The book is the first of two parts set in a story universe that was inspired by a space game called Starfire. David and Steve have let their imaginations run wild with their descriptions of space battles and character development.

When I finished this book, I couldn’t wait for the conclusion, The Shiva Option. Like many of David’s books, this one is a thick book. There’s a lot here to keep you entertained.

By David Weber , Steve White ,

Why should I read it?

1 author picked In Death Ground as one of their favorite books, and they share why you should read it.

What is this book about?

''In difficult ground, press on. In encircled ground, devise strategems. In death ground, fight.'' 5000 ye ars later, in the time of the 4th Interstellar War, Sun Tzu'' s advice still makes perfect sense for the humans and their allies the Orions. '


Book cover of Space Viking

Dietmar Arthur Wehr Author Of Phoenix Dawn

From my list on military SF books that are impossible to put down.

Why am I passionate about this?

I’ve had the urge to write stories as far back as public school. And despite encouragement from a creative writing teacher in high school, my first career ended up being corporate financial analysis. By the time I reached 59, I was (a) unemployed and unemployable (due to age) and (b) in a relationship with a wonderful woman who loved science fiction and was very creative (a former art teacher). With her encouragement, I finished my first SF novel at just the right time to benefit from the explosion of interest in reading ebooks bought on Amazon. I’ve now written 37 novels.

Dietmar's book list on military SF books that are impossible to put down

Dietmar Arthur Wehr Why Dietmar loves this book

I read this book at university and couldn’t put it down. It was written in the 1950s by an author who tragically took his own life just as he was on the verge of becoming as popular as Arthur C. Clark or Isaac Asimov. Do not be put off by the campy title. It’s a ‘rousing good yarn’ and may have influenced a lot of space opera writers over the years.

Piper was a student of history, and his historical knowledge is evident in this book. His writing style reflects the times he was in when curse words were not allowed every day, so he had to invent his own. Piper is also known for his very popular Fuzzies series and his Paratime stories.

I often wonder what other rousing good yarns he would have written if he had not committed suicide. I have reread all his books at least…

By H. Beam Piper ,

Why should I read it?

1 author picked Space Viking as one of their favorite books, and they share why you should read it.

What is this book about?

The novel follows the adventures of Lucas Trask, a nobleman and space captain who becomes a "Space Viking" after his home planet, Aton, is attacked and devastated by a neighboring planet. Seeking revenge for the destruction of his world, Trask gathers a crew of loyal followers and embarks on a mission to raid and plunder planets in the Sword Worlds, a region of space known for its piracy and lawlessness. Trask's ultimate goal is to build a new civilization and carve out a domain of his own amidst the chaos of the galactic frontier. Along the way, he faces various…


Book cover of Downbelow Station

Dietmar Arthur Wehr Author Of Phoenix Dawn

From my list on military SF books that are impossible to put down.

Why am I passionate about this?

I’ve had the urge to write stories as far back as public school. And despite encouragement from a creative writing teacher in high school, my first career ended up being corporate financial analysis. By the time I reached 59, I was (a) unemployed and unemployable (due to age) and (b) in a relationship with a wonderful woman who loved science fiction and was very creative (a former art teacher). With her encouragement, I finished my first SF novel at just the right time to benefit from the explosion of interest in reading ebooks bought on Amazon. I’ve now written 37 novels.

Dietmar's book list on military SF books that are impossible to put down

Dietmar Arthur Wehr Why Dietmar loves this book

I was enthralled by this book. If memory serves me correctly, C.J. Cherrryh was awarded the title of Grand Master by an SF organization for this book and it’s obvious why.

The scope of the story universe she has created is mind-boggling. The characters are believable, and the action makes your heart beat faster. There are scenes in the book that make you want to see them in a movie. I can say that this book and her style of writing has had a bigger impact on my own writing than any other author.

If military SF is your thing, you’ll love this book.

By C.J. Cherryh ,

Why should I read it?

3 authors picked Downbelow Station as one of their favorite books, and they share why you should read it.

What is this book about?

The Hugo Award-winning classic sci-fi novel about interstellar war.

The Beyond started with the Stations orbiting the stars nearest Earth. The Great Circle the interstellar freighters traveled was long, but not unmanageable, and the early Stations were emotionally and politically dependent on Mother Earth. The Earth Company which ran this immense operation reaped incalculable profits and influenced the affairs of nations.

Then came Pell, the first station centered around a newly discovered living planet. The discovery of Pell's World forever altered the power balance of the Beyond. Earth was no longer the anchor which kept this vast empire from coming…


Book cover of The Pride of Chanur

Dietmar Arthur Wehr Author Of Phoenix Dawn

From my list on military SF books that are impossible to put down.

Why am I passionate about this?

I’ve had the urge to write stories as far back as public school. And despite encouragement from a creative writing teacher in high school, my first career ended up being corporate financial analysis. By the time I reached 59, I was (a) unemployed and unemployable (due to age) and (b) in a relationship with a wonderful woman who loved science fiction and was very creative (a former art teacher). With her encouragement, I finished my first SF novel at just the right time to benefit from the explosion of interest in reading ebooks bought on Amazon. I’ve now written 37 novels.

Dietmar's book list on military SF books that are impossible to put down

Dietmar Arthur Wehr Why Dietmar loves this book

I found this book, the first of four in the series, to be fascinating in its portrayal of a race of intelligent, upright-walking lions. Cherryh’s ability to invent believable and fully fleshed-out alien races is delightful.

In this series, humans are the aliens. I loved how Cherryh made the reader root for the lions and their strange but understandable culture. It's a great concept by a great writer.

By C.J. Cherryh ,

Why should I read it?

3 authors picked The Pride of Chanur as one of their favorite books, and they share why you should read it.

What is this book about?

Excellent Book


Book cover of On Basilisk Station

Dietmar Arthur Wehr Author Of Phoenix Dawn

From my list on military SF books that are impossible to put down.

Why am I passionate about this?

I’ve had the urge to write stories as far back as public school. And despite encouragement from a creative writing teacher in high school, my first career ended up being corporate financial analysis. By the time I reached 59, I was (a) unemployed and unemployable (due to age) and (b) in a relationship with a wonderful woman who loved science fiction and was very creative (a former art teacher). With her encouragement, I finished my first SF novel at just the right time to benefit from the explosion of interest in reading ebooks bought on Amazon. I’ve now written 37 novels.

Dietmar's book list on military SF books that are impossible to put down

Dietmar Arthur Wehr Why Dietmar loves this book

I have enjoyed literally hundreds of hours of thrilling military SF in the series of which this book is the first novel. David Weber is one of two authors who have invented new SF sub-genres. In David’s case, the sub-genre is often called space opera. The other author is David Drake. His Hammer’s Slammers stories are now considered the first books in the ‘space marines’ sub-genre.

David Weber’s story universe is huge. I sometimes think it’s too big in the sense that he tries to weave too many sub-plots into the larger story arc. But his first book is quite moderate in this regard. I started writing my own military SF novels partly because Weber wasn’t writing new sequels fast enough to satisfy my thirst for thrilling space combat.