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Operation Medusa (Castle Federation Book 6) Kindle Edition
A war they cannot win by force
A plan to turn the tide of history!
For two years, the Castle Federation and the Alliance of Free Stars have stood against Marshal James Walkingstick of the Terran Commonwealth and his mission of conquest. Battles have been won and lost, worlds have died, and soldiers like Admiral Kyle Roberts have been forged on the anvil of war.
But the Alliance cannot win. The Commonwealth has more worlds, more ships, more soldiers. They claim their victory is inevitable. That history is on their side.
Refusing to accept the Commonwealth's future, the Alliance embarks on a do-or-die mission to end the war in one strike. If Kyle Roberts's plan works, the Commonwealth will break.
But if it fails the Alliance will be broken.
- LanguageEnglish
- Publication dateDecember 13, 2017
- File size3.3 MB
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See full series- Kindle Price:$16.97By placing your order, you're purchasing a license to the content and you agree to the Kindle Store Terms of Use.
- Kindle Price:$51.91By placing your order, you're purchasing a license to the content and you agree to the Kindle Store Terms of Use.
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This option includes 3 books.
This option includes 5 books.
This option includes 9 books.
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From the Publisher

In Books 1-6, follow the rise of Kyle Roberts as he goes from ace fighter pilot to war hero. An ensemble of characters join him along the way as they face heavy odds and an enemy bent on conquest.
A Hero Rises on the Eve of War
When an accident leaves starfighter pilot Kyle Roberts unable to fly, it changes the course of his career - and the war itself. Can he live up to his reputation as the Stellar Fox?
Explosive Starfighter Action
Enter a world of dynamic combat and innovative tactics, filled with heroes you root for. Transhuman fighter pilots, warships and carriers clash in vivid action-packed battles.
An Interstellar Conflict Threatens Billions
An old enemy launches a surprise attack and reignites a war. The Castle Federation is outgunned and on the defensive, and must rally to protect its citizens and allies.
In the Dakotan Confederacy Trilogy (books 6-9), follow the journey of an honorable man on the side of the enemy, as he wades through the ashes of war.
An Honorable Man in a Dishonorable World
Rear Admiral James Tecumseh survived the war with the Castle Federation with his reputation intact - only to be tested again by his own people.
Standing up to a Mentor Who Becomes an Enemy
War changes people, and sometimes not for the better. Tecumseh must oppose a man he once called a friend in the name of freedom.
A New Nation Finds Itself Trapped Between Tyrants
Outnumbered, outgunned, and with innocents to protect, Tecumseh must be innovative and clever while remaining true to his principles.
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Space Carrier Avalon
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Stellar Fox
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Q-Ship Chameleon
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Rimward Stars
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Operation Medusa
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Customer Reviews |
4.4 out of 5 stars 4,603
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4.5 out of 5 stars 2,717
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4.5 out of 5 stars 2,741
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4.5 out of 5 stars 2,634
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4.6 out of 5 stars 2,569
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4.6 out of 5 stars 2,661
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Price | $4.99$4.99 | $5.99$5.99 | $5.99$5.99 | $5.99$5.99 | $5.99$5.99 | $5.99$5.99 |
Series | Castle Federation | Castle Federation | Castle Federation | Castle Federation | Castle Federation | Castle Federation |
Book Number | 1 | 2 | 3 | 4 | 5 | 6 |
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Admiral's Oath
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To Stand Defiant
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Unbroken Faith
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Customer Reviews |
4.6 out of 5 stars 2,456
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4.6 out of 5 stars 1,811
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4.7 out of 5 stars 1,234
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Series | The Dakotan Confederacy | The Dakotan Confederacy | The Dakotan Confederacy | no data | no data | no data |
Book Number | 1 | 2 | 3 | no data | no data | no data |
Editorial Reviews
Review
- Nathan Lowell, author of the Solar Clipper series
"Space Carrier Avalon was a fast-moving space adventure story, with plenty of twists and turns and some stunning action sequences, and Stellar Fox continues in the same vein, but manages to still surprise. [...] I'm already looking forward to the next book to come!"
- Richard Tongue, Author of the Battlecruiser Alamo series
About the Author
Writing managed to liberate Glynn from a bleak future as an accountant. With his personality and hope for a high-tech future intact, he lives in Kitchener, Ontario with his partner, their cats, and an unstoppable writing habit.
Product details
- ASIN : B0788TLKGQ
- Publisher : Faolan's Pen Publishing Inc.
- Accessibility : Learn more
- Publication date : December 13, 2017
- Language : English
- File size : 3.3 MB
- Simultaneous device usage : Unlimited
- Screen Reader : Supported
- Enhanced typesetting : Enabled
- X-Ray : Not Enabled
- Word Wise : Enabled
- Print length : 338 pages
- Page Flip : Enabled
- Book 6 of 9 : Castle Federation
- Best Sellers Rank: #71,070 in Kindle Store (See Top 100 in Kindle Store)
- #362 in Galactic Empire Science Fiction eBooks
- #412 in Space Fleet Science Fiction
- #621 in Space Fleet Science Fiction eBooks
- Customer Reviews:
About the author

Glynn Stewart is the author of Starship’s Mage, a bestselling science fiction and fantasy series where faster-than-light travel is possible–but only because of magic. His other works include science fiction series Peacekeepers of Sol, Scattered Stars, and Castle Federation, as well as the urban fantasy series ONSET and Changeling Blood.
Writing managed to liberate Glynn from a bleak future as an accountant. With his personality and hope for a high-tech future intact, he lives in Alberta with his partner, their cats, and an unstoppable writing habit.
Customer reviews
- 5 star4 star3 star2 star1 star5 star69%27%4%0%0%69%
- 5 star4 star3 star2 star1 star4 star69%27%4%0%0%27%
- 5 star4 star3 star2 star1 star3 star69%27%4%0%0%4%
- 5 star4 star3 star2 star1 star2 star69%27%4%0%0%0%
- 5 star4 star3 star2 star1 star1 star69%27%4%0%0%0%
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers find this book to be a great completion to the series, with a thrilling story that builds pace nicely throughout. The book features well-developed characters, and one customer notes how the relationships between them feel real. Customers praise the writing quality, with one review highlighting the attention to detail in spelling, while another mentions how the series held their attention through all six volumes.
AI-generated from the text of customer reviews
Customers praise this book as a great ending to the series, with one customer describing it as a grand 6-book space opera.
"...A good finish to a GOOD SERIES!" Read more
"What a grand 6 book space opera. One of Glynn’s best. Is has it all, massive space warfare, politics, intrigue, and the human side as well...." Read more
"Good series, needs to stop using the F word. A great writer doesn’t need to use that kind of language...." Read more
"Congratulations to Glynn Stewart for this amazing series...." Read more
Customers enjoy the story quality of the book, praising its great plot and well-built pacing, with one customer highlighting the epic battles and another noting how it adds a sense of realism to the narrative.
"...It's sci-fi and set in the 2,700's. Faster-than-light was solved centuries ago and man has colonized a large number of star systems in the galaxy...." Read more
"...managed to bring new elements into each book in the series: story lines that feel new, not just reworked copies of the original book in the series;..." Read more
"Good story teller with plenty of action. A very fun read!" Read more
"...One of Glynn’s best. Is has it all, massive space warfare, politics, intrigue, and the human side as well...." Read more
Customers find the book enjoyable, describing it as a captivating and fun read.
"...The splitting of viewpoints (time and locale) was done professionally, and learning a bit more about Marshal Walkingstick (the main adversary) was..." Read more
"Good story teller with plenty of action. A very fun read!" Read more
"...-level space force officer to Navy Vice Admiral with aplomb and professionalism, performing in each at least one spectacular feat of command prowess..." Read more
"...smoothly and took you on a wonderful wild ride that was fun and satisfying...." Read more
Customers appreciate the well-developed characters in the book, with one customer noting that the relationships between them feel authentic.
"...This is one of the few I have finished. The characters seem very real and it was easy to be concerned about them...." Read more
"...new, not just reworked copies of the original book in the series; new characters; and of course, new challenges for the team...." Read more
"...Kyle Roberts is a wonderful protagonist, showing the right proportion of military acumen and human frailty...." Read more
"...who not only writes intelligently but also provides top rated plots, characters and excitement in the stories." Read more
Customers appreciate the writing quality of the book, with one customer noting the attention to detail in spelling.
"...It is a great story, well written and the relationships between the characters feel real." Read more
"Good story teller with plenty of action. A very fun read!" Read more
"...It’s extremely hard to find such an interesting and exciting author who not only writes intelligently but also provides top rated plots, characters..." Read more
"...I bought it because I really like the author and want to support him so he keeps writing...." Read more
Customers find the book engaging and fun to read, with one customer noting it was a wonderful wild ride that kept them turning pages throughout.
"...new in each book, and key players do die in battle, that the reader remains engaged." Read more
"...The story flowed smoothly and took you on a wonderful wild ride that was fun and satisfying...." Read more
"The Castle Federation series was a joy to read...." Read more
"This amazing series held my attention through all six volumes...." Read more
Top reviews from the United States
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- Reviewed in the United States on January 23, 2022I have started a number of book series. This is one of the few I have finished. The characters seem very real and it was easy to be concerned about them.
It's sci-fi and set in the 2,700's. Faster-than-light was solved centuries ago and man has colonized a large number of star systems in the galaxy. There are 2 main superpowers, a couple of smaller powers and a bunch of single systems trying to be independent. The larger of the 2 superpowers, The Commonwealth, has waged a war upon the second power, The Alliance, trying to unify all humanity. Familiar?
The storyline follows the career of Kyle Roberts of the Alliance from a fighter pilot to Admiral and chief strategist of their Navy. Like many sci-fi books, the issues of racism, sexism, ageism have been settled long ago. Now it is a quest for power and a people's desire to be free.
It is a great story, well written and the relationships between the characters feel real.
- Reviewed in the United States on March 2, 2018We find closure in the war, though not without cost. The splitting of viewpoints (time and locale) was done professionally, and learning a bit more about Marshal Walkingstick (the main adversary) was very welcome. I enjoyed the glimpses into the "foreign" cultures of the Alliance in previous books, and while I may have wished more, I admit it would have been a distraction in this book. And getting to know a villain who is not evil, but you still hate, is refreshing indeed. A good finish to a GOOD SERIES!
- Reviewed in the United States on April 20, 2024This series has managed to bring new elements into each book in the series: story lines that feel new, not just reworked copies of the original book in the series; new characters; and of course, new challenges for the team. While the stories all have space warfare at their core, enough is new in each book, and key players do die in battle, that the reader remains engaged.
- Reviewed in the United States on May 28, 2024Good story teller with plenty of action. A very fun read!
- Reviewed in the United States on March 10, 2023What a grand 6 book space opera. One of Glynn’s best. Is has it all, massive space warfare, politics, intrigue, and the human side as well. From the beginning of the Alliance’s war with the more powerful Terran commonwealth thru the to the end. What a great story.
- Reviewed in the United States on April 8, 2019Good series, needs to stop using the F word. A great writer doesn’t need to use that kind of language. If that was taken out Glynn Stewart would be an outstanding writer
- Reviewed in the United States on March 26, 2018Glynn Stewart put together one of the very few series which can successfully stand in the same library as David Weber' s Honor Universe. Weber sometimes sneaks through in the use of names like Basilisk and Manticore!
Kyle Roberts is a wonderful protagonist, showing the right proportion of military acumen and human frailty. He moves through the roles of mid-level space force officer to Navy Vice Admiral with aplomb and professionalism, performing in each at least one spectacular feat of command prowess, which move him up the ranks but makes political enemies as well.
The author has avoided the use of strange aliens in favor of an all human universe which may be typical several centuries hence. He has, of course, taken the usual liberties with the laws of physics, but that's inevitable. Earth, surprisingly, is the bad guy, trying to subjugate the entire known universe to it's hegemony by force. Space militarists will find a lot of space fleet action, but it's the people and the politics which make these books stand out.
- Reviewed in the United States on September 4, 2020Congratulations to Glynn Stewart for this amazing series. It’s extremely hard to find such an interesting and exciting author who not only writes intelligently but also provides top rated plots, characters and excitement in the stories.
Top reviews from other countries
- catfishReviewed in Canada on March 14, 2018
5.0 out of 5 stars a fine end to an excellent series
This is an excellent last book in the series. The plot is action-packed, and suspenseful.
One thing I should mention about the series in general is that I really like how much attention to detail was put into logistics and technology. In particular, Alcubierre warp drive is actually a theoretically-possible drive. It has huge problems, which are mentioned, and sometimes actually used as plot devices in the story. Most science fiction authors do not put this level of thought into their FTL drives. Significant thought was also put into the logistics of warfare, and the constraints this lead to in what it is possible for the various characters to actually do. Fuel can run out, exotic matter coils can break or be destroyed by enemy fire, starfighters can't carry very many missiles, and it takes time for missile salvos to reach the enemy, or for theirs to reach you. Light takes time to get to you, unless your quantum-entanglement communication is in place and working correctly.
There are a few inconsistencies in this particular book about things like the maritial status of the head of the Unification Committee, but really, not a huge issue.
I find myself wanting to know more about what happened in the Terran Commonwealth after the wars between the Commonwealth and everyone else ended. The situation in the Terran Commonwealth at the end of the book is poetic justice, though Walkingstick seems to have managed to be a karma houdini, and I find myself feeling ambivalent because there's a lot of decent people in the system that just got smashed, even if the people in charge, and the system as a whole, richly deserved its smashing.
As an antagonist nation, the Commonwealth is more interesting than many in fiction, because the people are shown as human beings, most of whom are not monsters. It is also interesting because it is in many ways fairly admirable. It is an oversize representative democracy. If it would kick its bad habit of trying to annex everyone else, and the related bad habits of crushing independence movements with really nasty methods and having certain officers who lose their tempers and commit atrocities, it would be downright good.
- Alison ShanahanReviewed in Australia on May 1, 2021
5.0 out of 5 stars Fantastic Series
I have just read this series non stop over the last few days, I couldn't put the books down! Totally addictive stories!
- AlexReviewed in the United Kingdom on December 15, 2017
5.0 out of 5 stars Fantastic series, enjoy!
Operation Medusa is the final book in the Castle Federation series. I like Glynn Stewart’s books and he does Sci-Fi well. This book was just as good as every other book in the series and did not disappoint. As always, I think the writing delivers a good balance between the pace and depth of the story which keeps me interested in the characters and their fate. I would certainly recommend.
Note: I received a free electronic copy in exchange for an unbiased review (but liked it enough to buy a copy anyway)
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AreanodReviewed in Germany on January 19, 2018
5.0 out of 5 stars No disappointment
Another great novel in the universe of the castle federation. Believeable characters and a thrilling story made me devour this book in less than two days. Can't wait for Book 7!
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borgh64Reviewed in Italy on February 15, 2019
4.0 out of 5 stars Ottima lettura
In linea con le storie precedenti avvincente e ben scritta.
Glynn Stewart è un ottimo narratore che riesce a coinvolgere in pieno il lettore