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Cage of Stars
Winner of the SciFidea Dyson Sphere Contest and shortlisted for the Andromeda Award, Cage of Stars is the latest from Frasier Armitage, acclaimed author of Time's Ellipse and A Stitch Between Worlds.
HOW FAR WOULD YOU GO TO BE FREE?
Inside the paradise of a Dyson Sphere, artificial intelligence has been outlawed and hunted. When a robot is dug up at the equator, it will have to flee if it wants to survive.
Told from the different perspectives of the humans and creatures who encounter the machine as it crosses the Sphere to seek refuge at the pole, can one robot's struggle for freedom change the world?
"A fabulous story with excellent characterisation and a deep understanding of the Dyson Sphere concept. I loved it!" - Robert J. Sawyer, Hugo award winning author of Flashforward and Hominids
"CAGE OF STARS brings to mind both questions philosophical and technological, the biological and artificial, nature versus innovation, with an immersive expansiveness that is tightly paced" - Ai Jiang, Nebula award winning author of Linghun, I Am AI, and A Palace Near The Wind
HOW FAR WOULD YOU GO TO BE FREE?
Inside the paradise of a Dyson Sphere, artificial intelligence has been outlawed and hunted. When a robot is dug up at the equator, it will have to flee if it wants to survive.
Told from the different perspectives of the humans and creatures who encounter the machine as it crosses the Sphere to seek refuge at the pole, can one robot's struggle for freedom change the world?
"A fabulous story with excellent characterisation and a deep understanding of the Dyson Sphere concept. I loved it!" - Robert J. Sawyer, Hugo award winning author of Flashforward and Hominids
"CAGE OF STARS brings to mind both questions philosophical and technological, the biological and artificial, nature versus innovation, with an immersive expansiveness that is tightly paced" - Ai Jiang, Nebula award winning author of Linghun, I Am AI, and A Palace Near The Wind
- GenresScience Fiction
324 pages, Kindle Edition
Published September 9, 2025
3 people are currently reading
128 people want to read
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Displaying 1 - 4 of 4 reviews
January 2, 2026
Thank you Frasier for sending me a copy to review!
Frasier was kind enough to invite me to his launch party and you can see the full video here: https://www.youtube.com/watch?v=1P2_f...
I am a huge fan of Frasier's writing, and Cage of Stars is no different. He's taken the idea of Dyson Sphere and turned it into a whole living, breathing world with multiple layers, societies and ideologies. I was blown away by all the different characters we meet and places we visit in Cage of Stars. We follow Mac essentially to the end of the world, and Frasier keeps up a rapid pace. It's utterly fantastic.
I have so many favourite moments and places in this book. From the first creatures we meet, to the religion we encounter, the Undercity... Seeing these places and creatures through their own eyes is the perfect way to introduce the reader to a world that is both familiar and utterly alien. There's an entire big plot running through the book that is unveiled through those we meet and the places we go.
Cage of Stars is an incredible journey across, and beneath, the surface of an expansive world. Hugely unique in voice and stunningly written. Who would’ve thought I could care so much about a robot?
Frasier was kind enough to invite me to his launch party and you can see the full video here: https://www.youtube.com/watch?v=1P2_f...
I am a huge fan of Frasier's writing, and Cage of Stars is no different. He's taken the idea of Dyson Sphere and turned it into a whole living, breathing world with multiple layers, societies and ideologies. I was blown away by all the different characters we meet and places we visit in Cage of Stars. We follow Mac essentially to the end of the world, and Frasier keeps up a rapid pace. It's utterly fantastic.
I have so many favourite moments and places in this book. From the first creatures we meet, to the religion we encounter, the Undercity... Seeing these places and creatures through their own eyes is the perfect way to introduce the reader to a world that is both familiar and utterly alien. There's an entire big plot running through the book that is unveiled through those we meet and the places we go.
Cage of Stars is an incredible journey across, and beneath, the surface of an expansive world. Hugely unique in voice and stunningly written. Who would’ve thought I could care so much about a robot?
September 19, 2025
This review can also be found at: https://fanfiaddict.com/review-cage-o...
Okay…let me be clear: Cage of Stars by Frasier Armitage is a book that I’m jealous of. I wish I’d written it and I will be adding it to a list of books I will re-read at some point. It was a whirlwind of a journey that took me across space and genres and I loved every minute of it.
I honestly didn’t know what I was getting into when I picked up Armitage’s latest work, but I’m infatuated by Dyson Spheres. I’m sure I, like many people, had never heard of Dyson Spheres until Geordi LaForge met his engineering icon Scotty Montgomery when the original Trek character embedded himself in a transporter buffer for decades until the Enterprise-D came along in Season 6 of Star Trek: The Next Generation. The concept of building a shell in a livable radius around a star was new and revelatory to adolescent me and still continues to intrigue me to this day.
Armitage takes the concept and uses it, but doesn’t focus on it. It’s there and the quirks of the Sphere play heavily into certain parts of Cage of Stars but he wisely makes his characters the main attraction and it pays off big time.
Our protagonist is Mac, a robot who was one of the builders of the Dyson Sphere, but then was buried under the dirt of this new world until he slowly worked his way to the surface, being reborn into a world he knew nothing about. Mac is so different from almost every character he meets in the book, but Armitage makes him the audience fill-in with an interesting trick -- he never lets Mac have his own POV. Every interaction with him is from the other characters’ point-of-view, so we never truly get his internal dialogue, but Mac is an open book, sharing his thoughts freely so instead we see everyone else’s reactions to him and…it works.
There was a familiarity to Cage of Stars that I couldn’t shake, but it wasn’t a perfect comparison to any one story. There is a bit of Odysseus vibe to Mac as he journeys from the earth and nature of the Sphere to Freedom, and the cast of characters lent itself to Huckleberry Finn and all the mad cap adventures he and Jim find themselves in. Ultimately, since Mac is almost like a newborn in a world that has adapted and evolved in the many years since he built it, a great comparison for was actually Are You My Mother?, the classic children’s book by P.D. Eastman.
There is an innocence to Mac’s character and some of the writing is beautiful as he embarks upon his journey that literally takes him from the earth to the sky. I found myself racing to finish once I got about two-thirds of the way through and had a wonderful time reading Cage of Stars. In the end, I was thrilled to read Frasier Armitage’s Cage of Stars and will gladly recommend it to anyone who asks.
Okay…let me be clear: Cage of Stars by Frasier Armitage is a book that I’m jealous of. I wish I’d written it and I will be adding it to a list of books I will re-read at some point. It was a whirlwind of a journey that took me across space and genres and I loved every minute of it.
I honestly didn’t know what I was getting into when I picked up Armitage’s latest work, but I’m infatuated by Dyson Spheres. I’m sure I, like many people, had never heard of Dyson Spheres until Geordi LaForge met his engineering icon Scotty Montgomery when the original Trek character embedded himself in a transporter buffer for decades until the Enterprise-D came along in Season 6 of Star Trek: The Next Generation. The concept of building a shell in a livable radius around a star was new and revelatory to adolescent me and still continues to intrigue me to this day.
Armitage takes the concept and uses it, but doesn’t focus on it. It’s there and the quirks of the Sphere play heavily into certain parts of Cage of Stars but he wisely makes his characters the main attraction and it pays off big time.
Our protagonist is Mac, a robot who was one of the builders of the Dyson Sphere, but then was buried under the dirt of this new world until he slowly worked his way to the surface, being reborn into a world he knew nothing about. Mac is so different from almost every character he meets in the book, but Armitage makes him the audience fill-in with an interesting trick -- he never lets Mac have his own POV. Every interaction with him is from the other characters’ point-of-view, so we never truly get his internal dialogue, but Mac is an open book, sharing his thoughts freely so instead we see everyone else’s reactions to him and…it works.
There was a familiarity to Cage of Stars that I couldn’t shake, but it wasn’t a perfect comparison to any one story. There is a bit of Odysseus vibe to Mac as he journeys from the earth and nature of the Sphere to Freedom, and the cast of characters lent itself to Huckleberry Finn and all the mad cap adventures he and Jim find themselves in. Ultimately, since Mac is almost like a newborn in a world that has adapted and evolved in the many years since he built it, a great comparison for was actually Are You My Mother?, the classic children’s book by P.D. Eastman.
There is an innocence to Mac’s character and some of the writing is beautiful as he embarks upon his journey that literally takes him from the earth to the sky. I found myself racing to finish once I got about two-thirds of the way through and had a wonderful time reading Cage of Stars. In the end, I was thrilled to read Frasier Armitage’s Cage of Stars and will gladly recommend it to anyone who asks.
February 23, 2026
I very much enjoyed my time with Cage of Stars; it was exactly what I needed, and I ended up devouring it rather quickly. It has an unusual style that I hadn’t come across before but which is explained by Frasier in the acknowledgements. Essentially, each chapter takes the point of view of a character or object that comes into contact with the robot as he journeys across the inside of the Sphere trying to reach the pole, whether that’s a mech hunter, a futuristic chimney-sweep, various animals, or even a river. Very rarely are we actually in the point-of-view of the robot itself. It’s very well done and highlights the impact that these chance meetings have on the individuals and societies across the Sphere.
All the chapters are preceded with a little tidbit of lore from an in-universe publication that relates to the contents of the chapter and gives a broader view of the immense worldbuilding. Similar to how the Dune novels have snippets from the writings of Muad’dib, court historians, and chroniclers. It all comes together very well, especially in the paperback version which has some excellent interior design for chapter headings. The worldbuilding itself is brilliant and mysterious. We see only a fraction of the full breadth of the Sphere in this book, but we get a sense of the age of it and the influence of Scantech over its people. The morality of all of it is is somewhat grey, too. Like the Mech Hunters, are they villains or heroes? From the perspective of the robot, they are, of course, but the book immediately makes us sympathetic to their views, too.
The characters are many and varied, and though most of them only stick around for a short while, they are all very memorable and nuanced. Frasier crafts the life of the Sphere with great depth very effectively in these short passages. A lot of classic sci-fi takes this approach when distances or timespans run into the extreme and, more often than not, fails the characters by making them cardboard cut-outs in their brief presence in the story. Not so, here. Each one, from the print-girl to the rebel mechs, to honest-to-god dinosaurs, are given great care and end up really well-rounded.
The implications of the ending are left open, too. The robot truly isn’t the focus of the struggles and trials of the Sphere—his journey is his own. But his impact on the people around him works as a catalyst. What that looks like after his journey’s conclusion is beyond the scope of the book and I really like that it’s left vague in that way.
I would love to see more stories set in this world, because the physics of the inside of a Dyson Sphere is fascinating and I have no doubt that Frasier could explore it with the same depth of care and attention to detail he has shown with Cage of Stars.
I would highly, highly recommend this book to any sci-fi fans. It’s a masterpiece.
All the chapters are preceded with a little tidbit of lore from an in-universe publication that relates to the contents of the chapter and gives a broader view of the immense worldbuilding. Similar to how the Dune novels have snippets from the writings of Muad’dib, court historians, and chroniclers. It all comes together very well, especially in the paperback version which has some excellent interior design for chapter headings. The worldbuilding itself is brilliant and mysterious. We see only a fraction of the full breadth of the Sphere in this book, but we get a sense of the age of it and the influence of Scantech over its people. The morality of all of it is is somewhat grey, too. Like the Mech Hunters, are they villains or heroes? From the perspective of the robot, they are, of course, but the book immediately makes us sympathetic to their views, too.
The characters are many and varied, and though most of them only stick around for a short while, they are all very memorable and nuanced. Frasier crafts the life of the Sphere with great depth very effectively in these short passages. A lot of classic sci-fi takes this approach when distances or timespans run into the extreme and, more often than not, fails the characters by making them cardboard cut-outs in their brief presence in the story. Not so, here. Each one, from the print-girl to the rebel mechs, to honest-to-god dinosaurs, are given great care and end up really well-rounded.
The implications of the ending are left open, too. The robot truly isn’t the focus of the struggles and trials of the Sphere—his journey is his own. But his impact on the people around him works as a catalyst. What that looks like after his journey’s conclusion is beyond the scope of the book and I really like that it’s left vague in that way.
I would love to see more stories set in this world, because the physics of the inside of a Dyson Sphere is fascinating and I have no doubt that Frasier could explore it with the same depth of care and attention to detail he has shown with Cage of Stars.
I would highly, highly recommend this book to any sci-fi fans. It’s a masterpiece.
September 30, 2025
Full review to come but a must read for anyone looking for an innovative and fresh take on several well beloved sci-fi tropes
Displaying 1 - 4 of 4 reviews