Margins
Class 5 book cover 1
Class 5 book cover 2
Class 5 book cover 3
Class 5
Series · 8 books · 2015-2024

Books in series

Dark Horse book cover
#1

Dark Horse

2015

Some secrets carry the weight of the world. Rose McKenzie may be far from Earth with no way back, but she's made a powerful ally—a fellow prisoner with whom she's formed a strong bond. Sazo's an artificial intelligence. He's saved her from captivity and torture, but he's also put her in the middle of a conflict, leaving Rose with her loyalties divided. Captain Dav Jallan doesn't know why he and his crew have stumbled across an almost legendary Class 5 battleship, but he's not going to complain. The only problem is, all its crew are dead, all except for one strange, new alien being. She calls herself Rose. She seems small and harmless, but less and less about her story is adding up, and Dav has a bad feeling his crew, and maybe even the four planets, are in jeopardy. The Class 5's owners, the Tecran, look set to start a war to get it back and Dav suspects Rose isn't the only alien being who survived what happened on the Class 5. And whatever else is out there is playing its own games. In this race for the truth, he's going to have to go against his leaders and trust the dark horse. Winner of a SFR Galaxy Award 2016 and the Prism Award 2016 for Best Futuristic.
Dark Deeds book cover
#2

Dark Deeds

2016

Far from home . . . Fiona Russell has been snatched from Earth, imprisoned and used as slave labor, but nothing about her abduction makes sense. When she’s rescued by the Grih, she realizes there’s a much bigger game in play than she could ever have imagined, and she’s right in the middle of it. Far from safe . . . Battleship captain Hal Vakeri is chasing down pirates when he stumbles across a woman abducted from Earth. She’s the second one the Grih have found in two months, and her presence is potentially explosive in the Grih’s ongoing negotiations with their enemies, the Tecran. The Tecran and the Grih are on the cusp of war, and Fiona might just tip the balance. Far from done . . . Fiona has had to bide her time while she’s been a prisoner, pretending to be less than she is, but when the chance comes for her to forge her own destiny in this new world, she grabs it with both hands. After all, actions speak louder than words.
Dark Minds book cover
#3

Dark Minds

2016

The mind is the most powerful weapon of all . . . Imogen Peters knows she's a pawn. She's been abducted from Earth, held prisoner, and abducted again. So when she gets a chance at freedom, she takes it with both hands, not realizing that doing so will turn her from pawn to kingmaker. Captain Camlar Kalor expected to meet an Earth woman on his current mission, he just thought he'd be meeting her on Larga Ways, under the protection of his Battle Center colleague. Instead, he and Imogen are thrown together as prisoners in the hold of a Class 5 battleship. When he works out she's not the woman who sparked his mission, but another abductee, Cam realizes his investigation just got a lot more complicated, and the nations of the United Council just took a step closer to war. Imogen's out of her depth in this crazy mind game playing out all around her, and she begins to understand her actions will have a massive impact on all the players. But she's good at mind games. She's been playing them since she was abducted. Guess they should have left her minding her own business back on Earth…
Dark Matters book cover
#4

Dark Matters

2019

DARK MATTERS . . . taking matters into her own hands A time bomb, waiting to go off . . . Lucy Harris is on the run, not sure where she can turn to for help, or if help is even available. But even as her abductors chase her down, she realizes they don't just want to recapture her, they want to erase her. When your very existence puts a planet at the risk of war, there's no choice but to do everything in your power to stay out of your enemies hands. A predator . . . waiting for the chance to pounce The powerful AI battleship, Bane, is accompanying the United Council envoy to Tecra to mete out the punishment the Tecrans have earned for breaking UC law. He revels in the power he's about to have over his old masters. But his mission isn't only to rain down retribution on the people who kept him chained for years, he's also looking for a human woman his fellow Class 5 thinking system mentioned in the final seconds of his life. Paxe admitted to taking Lucy Harris from Earth, and Bane has been looking for her ever since. A warrior conflicted . . . Commander Dray Helvan thinks the Grih made a mistake in not pushing for war with the Tecran, but he's had to accept the compromise, that he and the other envoys from the United Council will go to Tecra and dismantle its military from the top down. His mission is not one of his choosing, but when he and his team arrive, he's handed a very different job. While he distrusts Bane on principle, when the thinking system tells him there's a woman running for her life on the planet below, he will do whatever he has to to see her safe. And if that means war for Tecra, well, then it means war. This is book 4 in the award-winning Class 5 series.
Dark Ambitions book cover
#4.5

Dark Ambitions

2020

It's been months since Rose McKenzie was taken far from Earth. She's trying to make a place for herself amongst the Grih, with help from her Grihan lover, Captain Dav Jallan, and the dangerous and loyal Sazo, a powerful artificial intelligence who's integrated with an infamous Class 5 battleship. When Rose gets the chance to join an exploration team going down to collect information from a planet in Grihan airspace, she jumps at the opportunity to stretch her legs and breath some real air. But someone is already on the planet—the Krik—and they don't want anyone to know what they're up to. The Krik are the chaos agents of the United Council, often riding the edge of the law or over it. They ambush the exploration team and take them prisoner, but they don't realize they didn't get everyone. They didn't get Rose. With Dav, and his spaceship the Barrist, lured away by a distress signal, Rose and Sazo, along with a furry friend Rose has made, are the exploration team's only hope at rescue. And Rose never leaves a friend behind. NOTE: This novella was previously published in the PETS IN SPACE 5 anthology. It is book 4.5 in the Class 5 series.
Dark Class book cover
#5

Dark Class

2022

Waking up alone . . . Ellie Masters comes out of a coma to find herself the only inhabitant of an eerily empty moon station. She’s not on Earth any more, she’s not even in the right solar system. So when someone reaches out to her, tells her he’s her friend, she’s happy to believe it. The alternative is to be stuck alone with an enemy. The hunt of his career . . . Grih Battle Center captain, Renn Sorvihn, has been chasing a rogue Tecran ship for over a month, convinced its captain is simply trying to delay his inevitable surrender and punishment. But when Renn follows the Tecran ship into an unchartered sector, and realises the Tecran have been working their way to a secret moon base for weeks, he suddenly understands things are most definitely not as they seem. Caught in the crossfire . . . When the Tecran arrive, with the Grih hot on their heels, Ellie finds herself the catalyst for heightened danger to everyone. The Tecran see her as evidence of their military’s crimes, the Grih see her as a massive diplomatic complication, and her presence brings the whole confrontation up several thousand notches. But Ellie isn’t alone, and her new friend has ways to help her. Time to outclass them all . . .
Dark Class book cover
#5.5

Dark Class

Bonus Epilogue

2022

Join Ellie and the rest of the Earth women, their partners, and the Class 5s on Larga Ways for a reunion that will make more than a few members of the UC uncomfortable. Dark Class: Bonus Epilgoue is a 14K word novella. This free bonus epilogue to DARK CLASS, book 5 in the Class 5 series.
Collision Course book cover
#6

Collision Course

2024

A step into the unknown . . . Rose is looking forward to meeting the Fisone as part of the United Council’s outreach mission. Since the Tecran were defeated, and the full scope of their crimes were uncovered, the UC has wanted to find the Tecran’s victims and extend the hand of friendship. The fact that Rose is close to having her baby is just another element to the adventure of finding the Fisone’s planet and seeing if they could be potential allies. An explorer’s dream . . . Dav Jallan has been captain of the Barrist for a few years, but this is the first time he’s headed for a planet inhabited by advanced sentients. The Fisone exist—that is indisputable—and every part of this mission is why he became an explorer in the first place. The goal is to find them, form alliances, and make friends. The fact that he’s about to become a new father simply adds to his sense of excitement. A collision course with reality . . . When Sazo’s Class 5 and the Barrist enter the Fisone’s airspace, what they find is far from the uncomplicated meeting they had envisioned. The Fisone are divided, carrying a grudge, and are sure the Grih are no different from the Tecran they encountered the year before. When they take Rose as a hostage, both Dav and Sazo focus everything they have on finding her, and as the Fisone’s actions create more and more danger, ideas of alliances, friendship, and cooperation become less and less important. The only comfort both Dav and Sazo have to draw from is that Rose has been taken by others before, underestimated before, and her abductors have lived to regret it. They are counting on history repeating itself.

Author

Michelle Diener
Michelle Diener
Author · 38 books

Michelle Diener is a bestselling, award-winning author of historical fiction, science fiction and fantasy. Having worked in publishing and IT, she's now very happy crafting new worlds and interesting characters. Michelle was born in London and currently lives in Australia with her husband and two children. When she's not writing, or driving her kids from activity to activity, you can find her online at Twitter and Facebook.

548 Market St PMB 65688, San Francisco California 94104-5401 USA
© 2025 Paratext Inc. All rights reserved