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Son of Osivirius: A Clean Dystopian Romantic Science Fantasy Action Adventure
Two families. Two loyalties. One decision to make.
Fledgling pilot Jayden is one of the first generation to be born on the newly colonised planet of Osivirius. Now he’s determined to get his family out of ‘Wormsville’, the part of the colony where people are little more than numbers. So when Commander Tun offers a huge reward for finding the location of the rebel base, he jumps at the chance.
Nettle hates everything to do with the colony—especially the military arm—and is fiercely protective of the simple, grounded ways of the rebels. So when she and her brother Flint discover Jayden after he crash-lands, she’s ready to slit his throat without a second thought. But as Flint nurses him back to health, Nettle’s antipathy turns to empathy, and then an unwanted attraction.
Jayden, meanwhile, has made secret plans to escape on a Masu, one of the giant flying cats the rebels ride, but when his chance to escape presents itself, he feels torn. His blood family still need him, but the lure of the valley might just prove stronger.
In this award-winning, action-packed, and visionary novella, the mystical connection to nature of Avatar, the romantic tension of Outlander, the dystopian political struggle of The Hunger Games, and the character evolution of Ender's Game all meet. It's a perfect read for teens and adults who enjoy spiritual elements and clean enemies-to-lovers romance in a high-stakes futuristic setting.
Click ‘BUY NOW’ and dive into the world of Osivirius today!
"A lushly imagined, and hopeful serving of adventure filled with heart, humanity and flying cats. I loved it!" — Trent Jamieson, award-winning author of Stone Road, Day Boy, the Death Works Series, and the Nightbound Land Duology
"Delicious worldbuilding and characters that sparkle with agency. Son of Osivirius deftly highlights the importance of the natural world and humanity’s place within it. Cathryn DeVries weaves a brilliant tale.” — Pamela Jeffs, Aurealis Award winner and author of Wilder
"I adored this story from start to finish. A gripping plot, believable characters, and a richly immersive world that overflows with imagination and compassion." –Kylie Chan, best-selling author of the Dark Heavens series and the Dragon Empire series.
Fledgling pilot Jayden is one of the first generation to be born on the newly colonised planet of Osivirius. Now he’s determined to get his family out of ‘Wormsville’, the part of the colony where people are little more than numbers. So when Commander Tun offers a huge reward for finding the location of the rebel base, he jumps at the chance.
Nettle hates everything to do with the colony—especially the military arm—and is fiercely protective of the simple, grounded ways of the rebels. So when she and her brother Flint discover Jayden after he crash-lands, she’s ready to slit his throat without a second thought. But as Flint nurses him back to health, Nettle’s antipathy turns to empathy, and then an unwanted attraction.
Jayden, meanwhile, has made secret plans to escape on a Masu, one of the giant flying cats the rebels ride, but when his chance to escape presents itself, he feels torn. His blood family still need him, but the lure of the valley might just prove stronger.
In this award-winning, action-packed, and visionary novella, the mystical connection to nature of Avatar, the romantic tension of Outlander, the dystopian political struggle of The Hunger Games, and the character evolution of Ender's Game all meet. It's a perfect read for teens and adults who enjoy spiritual elements and clean enemies-to-lovers romance in a high-stakes futuristic setting.
Click ‘BUY NOW’ and dive into the world of Osivirius today!
"A lushly imagined, and hopeful serving of adventure filled with heart, humanity and flying cats. I loved it!" — Trent Jamieson, award-winning author of Stone Road, Day Boy, the Death Works Series, and the Nightbound Land Duology
"Delicious worldbuilding and characters that sparkle with agency. Son of Osivirius deftly highlights the importance of the natural world and humanity’s place within it. Cathryn DeVries weaves a brilliant tale.” — Pamela Jeffs, Aurealis Award winner and author of Wilder
"I adored this story from start to finish. A gripping plot, believable characters, and a richly immersive world that overflows with imagination and compassion." –Kylie Chan, best-selling author of the Dark Heavens series and the Dragon Empire series.
188 pages, Kindle Edition
Published February 17, 2026
17 people want to read
About the author
Cathryn deVries
2 books9 followersCathryn deVries is an award-winning fantasy and sci-fi author who explores themes of restorative justice, empowerment, connection with earth and spirit, and finding the true self in her work—all wrapped up in an epic package of immersive world-building and sweet romance. A former Air Force engineer and recovering perfectionist, she now home-schools her children, two of whom are on the autism spectrum. She and her family live in the Gold Coast Hinterland of Australia, where she enjoys living in a rainforest and pretending she’s an elf.
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Displaying 1 - 30 of 31 reviews
October 3, 2025
Sci fi fans put this on your TBR, this is an amazing world and story that will immerse you and take you for a great ride.
December 2, 2025
A wonderful blend of sci-fi/fantasy with an enemies-to-lovers central romance. Set on the relatively newly settled planet of Osivirius, the story’s worldbuilding is fabulous. The original colonists recreated Earth’s harshest practices with the elite in cold, shiny towers while exploited workers live and work underground in poverty and desperation. “Rebels” have left that world and created a nirvana by blending with the planet’s natural habitat and learning from the wisdom of the Masu, flying cat-like creatures who bond with human riders. Military helicopter pilot Jayden and rebel botanist Nettle are from opposite sides of this divide, each with inaccurate or incomplete understandings of the other’s worlds. They meet when Jayden’s helicopter crashes in rebel territory and Nettle and her brother discover him. I loved how Jayden and Nettle’s relationship evolved from antagonism and distrust to understanding and love over the course of the exciting drama. The low/no spice novel explores important issues in our life on Earth in an entertaining and engaging way, including environmentalism, inequality, materialism, and power. Highly recommend for fans of sci-fi, fantasy, and romance.
Thanks to the publisher for complimentary ARC. These opinions are my own.
Thanks to the publisher for complimentary ARC. These opinions are my own.
December 9, 2025
Really cool world. I like the sci-fantasy a lot. Interesting dynamics, though there are some story moments I would have liked to spend more time on. There’s a lottt of romance in this book. It’s very romance driven.
Enjoyable read! Very alike to James Cameron’s Avatar. Not very long but still fun
Enjoyable read! Very alike to James Cameron’s Avatar. Not very long but still fun
Review of advance copy received from Author
Adventurous and imaginative, a tale of complex allegiances and the decisions we make when our values are put to the test. Highly recommend for readers who love Avatar and cats
November 24, 2025
My YA loving heart loved this book! Fantasy Sci Fi! The book started and just threw you straight into the world, not a soft fluffy cushy place to land either! I believe that teens would really enjoy this book the main characters are relatable, the story moves fast, there is no cliff hanger. Very light romance throughout.
November 10, 2025
Great Sci Fi read for tween/teen readers. It was fast paced and fun.
February 17, 2026
A wonderful read!
I enjoyed how the author wrote a vast new world similar to the world of Pandora but made it all her own. I love the Masu and wish I had one in real life.
I also enjoyed how Jayden and Nettle’s relationship grew along the way and how that helped them grow as characters.
I enjoyed how the author wrote a vast new world similar to the world of Pandora but made it all her own. I love the Masu and wish I had one in real life.
I also enjoyed how Jayden and Nettle’s relationship grew along the way and how that helped them grow as characters.
October 13, 2025
Son of Osivirius is a science fantasy novel set on the lush, dangerous planet of Osivirius, where electromagnetic “dead-zones” and rebellion complicate humanity’s survival. The story follows Jayden, a young pilot who crashes into a rebel stronghold, and Nettle, a fierce and distrustful woman who sees him as a threat. As Jayden struggles to heal and find a way back to his family, he becomes entangled in the rebels’ world of harmony with nature, flying cats called Masu, and a philosophy centered around balance. The narrative alternates between Jayden and Nettle, pulling readers into both perspectives and building a tale of survival, mistrust, slow-burning connection, and the search for peace in a world fractured by exploitation and greed.
I was hooked almost from the first page. The opening crash sequence was tense and immersive, and from there, the story barely let up. What stood out most to me was the vivid world-building. The descriptions of the valley, the rebels’ way of life, and especially the Masu, those awe-inspiring winged felines, gave me that rare feeling of stepping into a completely new world that still felt alive and believable. I loved the contrast between the sterile, suffocating colony and the lush, self-sustaining rebel enclave. It made me think hard about our own world and how we treat the natural environment, but it never felt preachy. Instead, the themes came through naturally in the characters’ choices and conflicts.
My feelings about the characters were complicated, and that made the experience all the richer. Nettle frustrated me at times with her hostility and refusal to soften, yet I understood why she was like that, and I respected her strength. Jayden, on the other hand, walked a tricky line between being sympathetic and being manipulative, and I often found myself both rooting for him and distrusting him. That tension gave the story its bite. There were also moments where I felt the romance threads were a bit predictable, but the emotional undercurrents of family loyalty, grief, and the fear of betrayal kept me engaged.
Son of Osivirius surprised me with its heart. Beneath the adventure and the danger, this is a story about belonging and trust, and how hard it is to let go of fear in order to live freely. I would recommend this book to readers who enjoy science fiction that balances action with deeper themes, especially fans of Avatar or The Left Hand of Darkness. It’s also a great pick for anyone who wants an adventure with strong characters, a lush setting, and deep ideas.
I was hooked almost from the first page. The opening crash sequence was tense and immersive, and from there, the story barely let up. What stood out most to me was the vivid world-building. The descriptions of the valley, the rebels’ way of life, and especially the Masu, those awe-inspiring winged felines, gave me that rare feeling of stepping into a completely new world that still felt alive and believable. I loved the contrast between the sterile, suffocating colony and the lush, self-sustaining rebel enclave. It made me think hard about our own world and how we treat the natural environment, but it never felt preachy. Instead, the themes came through naturally in the characters’ choices and conflicts.
My feelings about the characters were complicated, and that made the experience all the richer. Nettle frustrated me at times with her hostility and refusal to soften, yet I understood why she was like that, and I respected her strength. Jayden, on the other hand, walked a tricky line between being sympathetic and being manipulative, and I often found myself both rooting for him and distrusting him. That tension gave the story its bite. There were also moments where I felt the romance threads were a bit predictable, but the emotional undercurrents of family loyalty, grief, and the fear of betrayal kept me engaged.
Son of Osivirius surprised me with its heart. Beneath the adventure and the danger, this is a story about belonging and trust, and how hard it is to let go of fear in order to live freely. I would recommend this book to readers who enjoy science fiction that balances action with deeper themes, especially fans of Avatar or The Left Hand of Darkness. It’s also a great pick for anyone who wants an adventure with strong characters, a lush setting, and deep ideas.
Review of advance copy received from Author
I was very fortunate to have been able to receive an ARC of this book and I must say overall I am very pleased with the overarching story as well as the characters. While it was action packed and moved at a good pace I was most impressed by how well the stakes were raised as the story progressed. I genuinely did not know how the story would end and the resolution to both external and internal conflicts was so satisfying. Each character’s goals were clear and understandable throughout the whole novel.
While readers will very quickly discern a similar vibe to the Avatar movies I assure you this is not at all a copy & paste of the franchise. Son of Osivirius has a unique charm all its own. It was clearly crafted and shaped with a great deal of time, energy, and love. Its compelling theme solidly carries you through the gripping adventure to a satisfying conclusion and resolution. In addition, I appreciated the beautiful world building. It was just enough detail to immerse myself in a unique environment while at the same time not bogging me down with unnecessary detail. The use of symbolism combined with the world building was especially impactful. It made me want to have a full bouquet of the blooms described. The author also provided an Art of Son of Osivirius download which further enhanced my appreciation for the characters and the botanicals she created for the story.
Lastly, I’ll touch on the characters. The contrast between Jayden and Nettle in the story was stellar. The swapping view points was done well and I loved being able to see and understand each character’s goals so closely. My only critique would be I wanted a little more from Nettle towards the end of the book. While their story was believable and built up well I almost felt like she could have had a greater moment of growth overcoming her own trauma during the fourth quadrant of story. Jayden is the protagonist so I get why he had the most screen time but the speed with which her emotions and trust fluctuate was a bit jarring for me personally. Much of that is minor though and their final scene together is so worth it! I definitely recommend this book for anyone who loves adventure but is tired of spice or too much overt violence. I would have no problem loaning this book to any pre-teen as it was a totally clean and easy sci-fi read. I wish there were more books like it.
While readers will very quickly discern a similar vibe to the Avatar movies I assure you this is not at all a copy & paste of the franchise. Son of Osivirius has a unique charm all its own. It was clearly crafted and shaped with a great deal of time, energy, and love. Its compelling theme solidly carries you through the gripping adventure to a satisfying conclusion and resolution. In addition, I appreciated the beautiful world building. It was just enough detail to immerse myself in a unique environment while at the same time not bogging me down with unnecessary detail. The use of symbolism combined with the world building was especially impactful. It made me want to have a full bouquet of the blooms described. The author also provided an Art of Son of Osivirius download which further enhanced my appreciation for the characters and the botanicals she created for the story.
Lastly, I’ll touch on the characters. The contrast between Jayden and Nettle in the story was stellar. The swapping view points was done well and I loved being able to see and understand each character’s goals so closely. My only critique would be I wanted a little more from Nettle towards the end of the book. While their story was believable and built up well I almost felt like she could have had a greater moment of growth overcoming her own trauma during the fourth quadrant of story. Jayden is the protagonist so I get why he had the most screen time but the speed with which her emotions and trust fluctuate was a bit jarring for me personally. Much of that is minor though and their final scene together is so worth it! I definitely recommend this book for anyone who loves adventure but is tired of spice or too much overt violence. I would have no problem loaning this book to any pre-teen as it was a totally clean and easy sci-fi read. I wish there were more books like it.
February 17, 2026
As a lover of fantasy and science fiction I don’t draw the line between reading YA or adult fantasy versions of either. I think both have a most worthy place on your bookshelf despite your age and Sons of Osivirius should be no exception.
The book has a strong story line and Cathryn writes enough description to give the reader a strong sense of the world building, without making the book too wordy. The characters have a good depth and there is the briefest of YA Romance that comes through, without making it seem to much like a ‘girls’ book.
I thought the pace was well balanced and I liked how for once – rather than skimming over someone’s accident to them finally getting well enough – we saw a bit of the recovery process and frustrations about needing to rely on your ‘enemies’ to aid recovery.
The only slight issue I find with Sci-Fi is that when you have a planet that is being destroyed by humans and there are those who live in the woods and create a symbiotic relationship with the animals and plants that live around them – that I get Avatar stuck in my head (especially because it was such a major blockbusting film at pivotal moment in my past). But this is just my brain needing to compare things to other things and gets latched onto things too much at times.
I think we need these types of stories – those reminders that at the heart of what we all want and need is love, family and a place to call home. And I think more books on going back to live simpler lives in the air and greenery is always a true win.
Overall I really enjoyed reading it – my favourite character was Nettle – always a sucker from a strong FMC especially one who is a little bit nettle-y and who shows strength, but then allows others to see her weaknesses as well.
Great book and I will be looking out for more by Cathryn – thanks for sharing!
The book has a strong story line and Cathryn writes enough description to give the reader a strong sense of the world building, without making the book too wordy. The characters have a good depth and there is the briefest of YA Romance that comes through, without making it seem to much like a ‘girls’ book.
I thought the pace was well balanced and I liked how for once – rather than skimming over someone’s accident to them finally getting well enough – we saw a bit of the recovery process and frustrations about needing to rely on your ‘enemies’ to aid recovery.
The only slight issue I find with Sci-Fi is that when you have a planet that is being destroyed by humans and there are those who live in the woods and create a symbiotic relationship with the animals and plants that live around them – that I get Avatar stuck in my head (especially because it was such a major blockbusting film at pivotal moment in my past). But this is just my brain needing to compare things to other things and gets latched onto things too much at times.
I think we need these types of stories – those reminders that at the heart of what we all want and need is love, family and a place to call home. And I think more books on going back to live simpler lives in the air and greenery is always a true win.
Overall I really enjoyed reading it – my favourite character was Nettle – always a sucker from a strong FMC especially one who is a little bit nettle-y and who shows strength, but then allows others to see her weaknesses as well.
Great book and I will be looking out for more by Cathryn – thanks for sharing!
Review of advance copy received from Author
Warnings: moderate swearing, death, and some violence
This was an amazing science fantasy novella! From the first page I was sucked in and invested in Jayden's story. I enjoyed his growing camaraderie with Flint and how he integrated into the valley, even if it was for the wrong reasons at first. I loved how he kept trying to crack the wall that Nettle had built, and watching their no-spice romance slowly build. The Masu creatures were a great touch, bringing hope and balance to the people and the world they had settled on. The world-building was exquisite, with wonderful descriptions that brought the story to life.
Jayden ventures out in his 'thopter to scour the land, hoping to find the rebels and collect the reward money so his family can finally live above ground. He didn't expect to barely survive a horrible crash, and be found by the enemy, who show him mercy and nurse him back to health. As he's recovering, he gathers intel for his colony, befriends Flint, and endures the distrust of Flint's sister, Nettle. Interacting with the village people and seeing the bond they have with The Masu, the indigenous flying cats of the planet, slowly changes his mind. He realizes that their way of life doesn't make them the enemy, and they just might be the planet's only hope for a future. When Jayden returns to the colony as a mediator, he's hopeful that they'll no longer see the rebels as a threat, but as valuable assets. Unfortunately, the tyrannical leader doesn't want to give up his power and tries to trick everyone with his schemes.
Will Nettle learn to trust Jayden before it's too late? Will the village and Masu be able to change the minds and hearts of the colony?
I received an Advanced Reader Copy with no expectation of a review. All opinions are my own.
This was an amazing science fantasy novella! From the first page I was sucked in and invested in Jayden's story. I enjoyed his growing camaraderie with Flint and how he integrated into the valley, even if it was for the wrong reasons at first. I loved how he kept trying to crack the wall that Nettle had built, and watching their no-spice romance slowly build. The Masu creatures were a great touch, bringing hope and balance to the people and the world they had settled on. The world-building was exquisite, with wonderful descriptions that brought the story to life.
Jayden ventures out in his 'thopter to scour the land, hoping to find the rebels and collect the reward money so his family can finally live above ground. He didn't expect to barely survive a horrible crash, and be found by the enemy, who show him mercy and nurse him back to health. As he's recovering, he gathers intel for his colony, befriends Flint, and endures the distrust of Flint's sister, Nettle. Interacting with the village people and seeing the bond they have with The Masu, the indigenous flying cats of the planet, slowly changes his mind. He realizes that their way of life doesn't make them the enemy, and they just might be the planet's only hope for a future. When Jayden returns to the colony as a mediator, he's hopeful that they'll no longer see the rebels as a threat, but as valuable assets. Unfortunately, the tyrannical leader doesn't want to give up his power and tries to trick everyone with his schemes.
Will Nettle learn to trust Jayden before it's too late? Will the village and Masu be able to change the minds and hearts of the colony?
I received an Advanced Reader Copy with no expectation of a review. All opinions are my own.
February 17, 2026
I’ve always been a huge fan of dystopian sci-fi and movies like James Cameron’s Avatar, so when I heard that Cathryn DeVries’ Son of Osivirius fit the bill, I had to see for myself. Sure enough, the book comes packed to the brim with gorgeously imagined locales, spirited characters, and a healthy dose of evil governments in need of overthrowing.
One of my favorite features of the book had to be the Masu—large winged felines capable of establishing a mental connection with their riders. They felt so alive and layered, giving the planet of Osivirius its own unique flavor. It was also fun to watch the protagonist, Jayden, have to learn a symbiosis with the creatures. Like the dragons of Fourth Wing, the Masu have intelligence and require an empathic link to perform as desired. It makes the adventure and combat feel earned, and the depth of the story’s prose made me feel like I was in the saddle myself.
As for the characters, we’ve got our intrepid YA trio, Jayden, Nettle and Flint. Personally, I liked Flint the most. He’s got such a sweet and trusting nature, and I’m always partial to the comic relief. As for Jayden and Nettle, the love-hate relationship between the two wasn’t a huge surprise, but I’m also a sucker for enemies-to-lovers, so I certainly enjoyed watching the sparks fly.
Overall, it was an entertaining romp through an alien world with decent pacing and a solid premise. As a novella, there wasn’t a lot of time to delve deeper into the various side characters and the nuance of the human colony’s social dynamics, but the upside is a quick read and enough emotional satisfaction for any lover of sci-fi.
One of my favorite features of the book had to be the Masu—large winged felines capable of establishing a mental connection with their riders. They felt so alive and layered, giving the planet of Osivirius its own unique flavor. It was also fun to watch the protagonist, Jayden, have to learn a symbiosis with the creatures. Like the dragons of Fourth Wing, the Masu have intelligence and require an empathic link to perform as desired. It makes the adventure and combat feel earned, and the depth of the story’s prose made me feel like I was in the saddle myself.
As for the characters, we’ve got our intrepid YA trio, Jayden, Nettle and Flint. Personally, I liked Flint the most. He’s got such a sweet and trusting nature, and I’m always partial to the comic relief. As for Jayden and Nettle, the love-hate relationship between the two wasn’t a huge surprise, but I’m also a sucker for enemies-to-lovers, so I certainly enjoyed watching the sparks fly.
Overall, it was an entertaining romp through an alien world with decent pacing and a solid premise. As a novella, there wasn’t a lot of time to delve deeper into the various side characters and the nuance of the human colony’s social dynamics, but the upside is a quick read and enough emotional satisfaction for any lover of sci-fi.
February 21, 2026
I have once again grabbed a book from my least read genre as I love to be surprised and prove to myself that I really can enjoy reading pretty much everything.
And once again, I really enjoyed this read.
The first thing that grabbed me was the short chapters which pulled me into the story quickly and left me wanted to read on.
The whole book was pretty short at under 200 pages and this kept me hooked from start to finish.
The story is told over a dual pov and the chapters take us between our two main characters Jayden and Nettle.
Jayden, a Colony pilot, crashes near a rebel outpost and when Nettle and her brother Flint discover him, there's a conflict of opinion.
Nettle and Jayden have been brought up as enemies but Flint is much more forgiving and takes Jayden in to heal him.
This moves along swiftly and it was great to see the characters develop and pull away from what they've been told to believe and move to understanding each other and accepting that neither was truly the enemy.
This was a really sweet story and I loved all our characters.
Although so different from our own lives and situations - the message was clear and very relatable.
I normally get quite bogged down with the world building in books, but this was done really well and I loved that this developed the whole lifestyle as well as just the politics.
I obviously adored the Masu - a crazy idea and vision - but oh how I loved the concept.
A great read and I'm looking forward to seeing more from this author soon.
And once again, I really enjoyed this read.
The first thing that grabbed me was the short chapters which pulled me into the story quickly and left me wanted to read on.
The whole book was pretty short at under 200 pages and this kept me hooked from start to finish.
The story is told over a dual pov and the chapters take us between our two main characters Jayden and Nettle.
Jayden, a Colony pilot, crashes near a rebel outpost and when Nettle and her brother Flint discover him, there's a conflict of opinion.
Nettle and Jayden have been brought up as enemies but Flint is much more forgiving and takes Jayden in to heal him.
This moves along swiftly and it was great to see the characters develop and pull away from what they've been told to believe and move to understanding each other and accepting that neither was truly the enemy.
This was a really sweet story and I loved all our characters.
Although so different from our own lives and situations - the message was clear and very relatable.
I normally get quite bogged down with the world building in books, but this was done really well and I loved that this developed the whole lifestyle as well as just the politics.
I obviously adored the Masu - a crazy idea and vision - but oh how I loved the concept.
A great read and I'm looking forward to seeing more from this author soon.
February 5, 2026
I want to thank Cathryn deVries for this ARC (Advanced Reader Copy) of Sons of Osivirius.
What would it be like to inhabit an unkown planet with uknown resources? What if there were flying cats that connected to you through a mind link? This was such an awesome story with so much vision behind it! Sons of Osivirius by Cathryn deVries is set on a newer inhabited planet that has random dead zones popping up and shutting down the mining of the precious oscillium. Jayden is sent out to search for the rebels who are being blamed for the blackouts. However, when he crash lands on the way, he never expects what finds him and is surprised to find that things may not be as they were told to him.
I typically don’t enjoy novellas because I feel like they are missing so much detail, however, deVries did a phenomenal job at the pacing and description of this planet. Not only did she describe the land and creatures well, but also the main colony. She also did an amazing job at creating great dialogue and personality between the characters. I could see this world being expanded on as well in so many different avenues!
I think my favorite thing about the book was definitely the Masu, flying cats. They were so majestic and beautiful and definitely made the story so much more vivid and full. The writing was also really well done and there were very few grammar errors. The technology and nature pushing against each other was an aggressive picture of how too much technology really does take away from the beauty of the world around us. I loved the message behind this as I really do believe unplugging from technology and enjoying what’s in front of you is so important.
I really enjoyed reading Sons of Osivirius by Cathryn deVries and I am excited to see what else she has in store! This is a young adult science fiction with mild cursing, some gun violence, and mild kissing. I highly recommend this book to any young adults, and older, who love the science fiction genre!
What would it be like to inhabit an unkown planet with uknown resources? What if there were flying cats that connected to you through a mind link? This was such an awesome story with so much vision behind it! Sons of Osivirius by Cathryn deVries is set on a newer inhabited planet that has random dead zones popping up and shutting down the mining of the precious oscillium. Jayden is sent out to search for the rebels who are being blamed for the blackouts. However, when he crash lands on the way, he never expects what finds him and is surprised to find that things may not be as they were told to him.
I typically don’t enjoy novellas because I feel like they are missing so much detail, however, deVries did a phenomenal job at the pacing and description of this planet. Not only did she describe the land and creatures well, but also the main colony. She also did an amazing job at creating great dialogue and personality between the characters. I could see this world being expanded on as well in so many different avenues!
I think my favorite thing about the book was definitely the Masu, flying cats. They were so majestic and beautiful and definitely made the story so much more vivid and full. The writing was also really well done and there were very few grammar errors. The technology and nature pushing against each other was an aggressive picture of how too much technology really does take away from the beauty of the world around us. I loved the message behind this as I really do believe unplugging from technology and enjoying what’s in front of you is so important.
I really enjoyed reading Sons of Osivirius by Cathryn deVries and I am excited to see what else she has in store! This is a young adult science fiction with mild cursing, some gun violence, and mild kissing. I highly recommend this book to any young adults, and older, who love the science fiction genre!
February 17, 2026
Thank you LBT for having me on this review tour and for my gifted copy of this epub.
This was a good read. I got into this book pretty fast. This is a sci fi fantasy but we also have enemies to lovers too l mean how cool is that ?!
We take place in a relatively newly settled planet of Osivirius which by the way the world building is fantastic!!! So rebels have essentially left the world and well they kinda started a natural habitat and we have Masu who are cat like things that bond with humans can I just say I want one. Like how can we make these a reality?! Like how ?!
We follow Jayden who is a military helicopter copter pilot and also rebel botanist Nettle which would be a cool job I have to say. Anyways they are from the opposite sides and well with that comes not knowing what the other does and a lot of well not accurate and not a lot of understandings of what the other does. I found it super cool how they all met. Jayden’s helicopter crashed and Nettle and her brother found him. I also liked the attraction between Jayden and Nettle and how it started out how they didn’t trust to just love least I felt was love !! This was a really exciting read. I really loved the romance in this. No spice but it still was good and really engaging.
Overall this is a book that kinda makes you think. I mean least did for me. I was like hmmm. I still am like this was so good such a great concept for a book. I really can’t wait to read more by this author !!
This was a good read. I got into this book pretty fast. This is a sci fi fantasy but we also have enemies to lovers too l mean how cool is that ?!
We take place in a relatively newly settled planet of Osivirius which by the way the world building is fantastic!!! So rebels have essentially left the world and well they kinda started a natural habitat and we have Masu who are cat like things that bond with humans can I just say I want one. Like how can we make these a reality?! Like how ?!
We follow Jayden who is a military helicopter copter pilot and also rebel botanist Nettle which would be a cool job I have to say. Anyways they are from the opposite sides and well with that comes not knowing what the other does and a lot of well not accurate and not a lot of understandings of what the other does. I found it super cool how they all met. Jayden’s helicopter crashed and Nettle and her brother found him. I also liked the attraction between Jayden and Nettle and how it started out how they didn’t trust to just love least I felt was love !! This was a really exciting read. I really loved the romance in this. No spice but it still was good and really engaging.
Overall this is a book that kinda makes you think. I mean least did for me. I was like hmmm. I still am like this was so good such a great concept for a book. I really can’t wait to read more by this author !!
Review of advance copy received from Author
Son of Osivirius stands out as a thoughtful piece of science fantasy that values character agency and ideas just as much as adventure. Cathryn deVries creates a setting that feels carefully considered, with themes of responsibility, connection to the natural world, and chosen family woven naturally into the narrative fabric. The characters feel purposeful and emotionally grounded, making their decisions and relationships engaging. What works especially well is the balance between introspection and forward momentum. The story invites reflection while still offering tension, discovery, and moments of wonder, giving readers space to connect with both the world and the people who inhabit it. There is a sincerity to the writing that feels earned, and the compassion running through the book gives it a distinctive voice within the genre. Son of Osivirius is an immersive and rewarding read for fans of science fantasy who appreciate rich worldbuilding, thoughtful themes, and characters who feel genuinely invested in the world they are trying to protect.
Review of advance copy received from Indie Reviewers
Cathryn deVries’s Son of Osivirius left me unexpectedly hopeful for our own world. In this sci-fi-fantasy-dystopian story, a group of rebels breaks away from the main population to learn how to heal the land ravaged by relentless mining and exploitation. As they learn to live in harmony with the earth, the dominant civilization continues its destructive path—until the rebels can no longer remain hidden. They must rise and fight for the world they call home.
DeVries’s characters are vibrant and authentic, and the world-building is both beautiful and immersive. My favourite YA trope—enemies to friends—is wonderfully realized through Finn, who sets off this transformation from the very first moment he discovers an enemy trespassing on their hidden sanctuary. I hope DeVries continues writing in this world, because I’m completely hooked on the story, and curious about what comes next for Finn, Nettle, Jayden, and the huge flying cats. :)
DeVries’s characters are vibrant and authentic, and the world-building is both beautiful and immersive. My favourite YA trope—enemies to friends—is wonderfully realized through Finn, who sets off this transformation from the very first moment he discovers an enemy trespassing on their hidden sanctuary. I hope DeVries continues writing in this world, because I’m completely hooked on the story, and curious about what comes next for Finn, Nettle, Jayden, and the huge flying cats. :)
February 19, 2026
This was such a great novella! It was fast paced with short chapters. We get POVs from Jayden, a colonist, and Nettle, a rebel. I loved getting both of their perspectives. There is a romance subplot, and the development of that relationship felt organic.
There's some political power struggle, the balance of nature versus technology, and - perhaps my favorite - trying to find harmony and symbiosis with the apex predator species of the planet humanity is attempting to colonize. So much was packed deftly into this novella. Definitely recommend this for my sci-fi and fantasy friends. If romance is a deterrent for you, don't let it keep you from reading this. It's YA and there's zero spice.
💜 Thank you so much to Cathryn Devries and Love Books Tours for the gifted digital copy! All thoughts expressed are my own.
There's some political power struggle, the balance of nature versus technology, and - perhaps my favorite - trying to find harmony and symbiosis with the apex predator species of the planet humanity is attempting to colonize. So much was packed deftly into this novella. Definitely recommend this for my sci-fi and fantasy friends. If romance is a deterrent for you, don't let it keep you from reading this. It's YA and there's zero spice.
💜 Thank you so much to Cathryn Devries and Love Books Tours for the gifted digital copy! All thoughts expressed are my own.
February 21, 2026
Son of Osivirius is a great YA novella that would capture the imagination of any young reader.
The characters are engaging and the plot has plenty to it, especially towards the end.
I really loved the idea of the Maru and the mind link, it would be great if we could really connect to animals that way.
Jayden is a very relatable character torn between helping his family and hurting his new found friends. It really is quite the moral conundrum.
I also liked how the story sort of had a message in it around humans destroying the planet and working against each other all the time rather than working together and appreciating the nature we have around us.
The characters are engaging and the plot has plenty to it, especially towards the end.
I really loved the idea of the Maru and the mind link, it would be great if we could really connect to animals that way.
Jayden is a very relatable character torn between helping his family and hurting his new found friends. It really is quite the moral conundrum.
I also liked how the story sort of had a message in it around humans destroying the planet and working against each other all the time rather than working together and appreciating the nature we have around us.
February 21, 2026
📆 single timeline.
👀 dual POV
🐢 -🐇 fast-paced
💬 "the valley wouldn't be her only haven anymore. I would be too"
This was a quick little read that I think would be perfect for the YA reader who is new to the sci-fi and fantasy genres.
Devries has built a world that has been described with enough details to
make it feel real, but with out over doing it and making it boring to read, which is something I find happens from time to time.
The plot was well paced, and there were some nice twists that held my attention. I really liked the concept of the Masu, and the way that riders could connect with them.
👀 dual POV
🐢 -🐇 fast-paced
💬 "the valley wouldn't be her only haven anymore. I would be too"
This was a quick little read that I think would be perfect for the YA reader who is new to the sci-fi and fantasy genres.
Devries has built a world that has been described with enough details to
make it feel real, but with out over doing it and making it boring to read, which is something I find happens from time to time.
The plot was well paced, and there were some nice twists that held my attention. I really liked the concept of the Masu, and the way that riders could connect with them.
Review of advance copy received from Author
I had the chance to ARC read Son of Osirius, and it completely pulled me in. The world feels vivid and alive, the characters are well-rounded and easy to care about, and the flying cats were honestly one of my favorite parts.
The story reminded me of the feeling I had watching Avatar for the first time... that blend of otherworldly beauty, immersive setting, and emotional connection to the people inside the story. If you love science fantasy that balances wonder with character-driven storytelling, this one delivers.
The story reminded me of the feeling I had watching Avatar for the first time... that blend of otherworldly beauty, immersive setting, and emotional connection to the people inside the story. If you love science fantasy that balances wonder with character-driven storytelling, this one delivers.
February 20, 2026
Definitely recommend
Son of Osivirius by Cathryn Devries.
I really really did enjoy this book. I loved the cover and blurb of this book. I wasn't sure when I first started it. But as I read on I couldn't put it down. I did like the writing style and the story. loved the giant flying cats. I would love to see this on TV. The special effects would be amazing. I loved Jayden and Nettle. The chemistry between them. Wow. The action. I was surprised. I do hope there is more to come.
Son of Osivirius by Cathryn Devries.
I really really did enjoy this book. I loved the cover and blurb of this book. I wasn't sure when I first started it. But as I read on I couldn't put it down. I did like the writing style and the story. loved the giant flying cats. I would love to see this on TV. The special effects would be amazing. I loved Jayden and Nettle. The chemistry between them. Wow. The action. I was surprised. I do hope there is more to come.
Review of advance copy received from Author
Wow this was incredible!
Right from the start we are swept into this wonderful world Osivirius. @_eclecta_perennial is magnificent and on point with the world building in this. I have a very vivid picture in my mind.
When Jayden a pilot for the Colony crashes near the Rebel out post he is not sure what they will do with him. Flint his saviour is adamant to heal him while his sister Nettle wishes for his death. We go on his healing journey with him and it is both sweet and endearing. I loved to learn of all the different foods and animals. Along with this was a deeper journey for Nettle of forgiveness and acceptance and for Jayden of understanding and belonging.
About halfway things started speading up and I was feverishly trying to keep up, I couldn't put this down, hoping the whole way that they could salvage a relationship with the Colony. You will have to read the book to see what happens!
This was a great science fiction fantasy and would do amazing for any fans of the genre! Fast paced and full of meaning and trust me you will want to have your own Masu after this is done!
Right from the start we are swept into this wonderful world Osivirius. @_eclecta_perennial is magnificent and on point with the world building in this. I have a very vivid picture in my mind.
When Jayden a pilot for the Colony crashes near the Rebel out post he is not sure what they will do with him. Flint his saviour is adamant to heal him while his sister Nettle wishes for his death. We go on his healing journey with him and it is both sweet and endearing. I loved to learn of all the different foods and animals. Along with this was a deeper journey for Nettle of forgiveness and acceptance and for Jayden of understanding and belonging.
About halfway things started speading up and I was feverishly trying to keep up, I couldn't put this down, hoping the whole way that they could salvage a relationship with the Colony. You will have to read the book to see what happens!
This was a great science fiction fantasy and would do amazing for any fans of the genre! Fast paced and full of meaning and trust me you will want to have your own Masu after this is done!
Review of advance copy received from Author
This was a really interesting read! For being a short book/novella, there was so much world building in it. The story really came alive for me. I would love to read another book set in this world!
I received a complimentary copy from the publisher. I was not required to write a positive review. All opinions expressed are mine alone.
I received a complimentary copy from the publisher. I was not required to write a positive review. All opinions expressed are mine alone.
November 28, 2025
Intense story with a great worldbuilding and may I say how much I love the Masu?? These wondrous creatures are just awesome and also the two main characters Jayden and Nettle.
Read it, you will not be disappointed.
Read it, you will not be disappointed.
Review of advance copy received from Author
I absolutely loved this story! It’s full of adventure, loveable characters, and giant flying cats! But what I loved most was how this story gently challenges readers to see the world through different eyes, and the arc is simply beautiful! I highly recommend!
February 18, 2026
I absolutely enjoyed this book from start to finish. The plot, the stakes, the world building... Everything was exquisite.
February 21, 2026
An Effective and Solid Story
Likable characters, an intriguing setting, and a well told story. I hope we get to see more of this world.
Likable characters, an intriguing setting, and a well told story. I hope we get to see more of this world.
Review of advance copy received from Author
Science Fiction is the genre I read the least of. Yet, I raced through this novella in only a couple of sittings and immediately looked up the author’s other books. This clearly shows how gripping this story is and also how fantastic the writing is.
I think I enjoyed this sci-fi story because it also had a touch of dystopian, fantasy and romance. The book begins with Jayden, on a mission from Osivirius, crash landing into the Rebel’s camp. The story begins and continues to be action fuelled. The pace was kept fast, especially as time was moving on swiftly. The longer Jayden spent in the camp the more friendships he formed. There was a particularly sweet romance blossoming between Jayden and Nettle as well as a bromance with her brother Flint.
It was a high stakes, intense read. I was gripped by the storyline and I loved the descriptive writing. I could imagine this futuristic world and what a strange sight the Masu, giant flying cats, must be.
I think I enjoyed this sci-fi story because it also had a touch of dystopian, fantasy and romance. The book begins with Jayden, on a mission from Osivirius, crash landing into the Rebel’s camp. The story begins and continues to be action fuelled. The pace was kept fast, especially as time was moving on swiftly. The longer Jayden spent in the camp the more friendships he formed. There was a particularly sweet romance blossoming between Jayden and Nettle as well as a bromance with her brother Flint.
It was a high stakes, intense read. I was gripped by the storyline and I loved the descriptive writing. I could imagine this futuristic world and what a strange sight the Masu, giant flying cats, must be.
Review of advance copy received from Author
This was a fun book to read. It had it all: adventure, romance, giant cats. Really enjoyed escaping into this story, and I'm always a sucker for romance. Not too long or too short. Love, love love it. 10/10. Looking forward to the next thing the authors write.
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