Books like 'Sidespace'

Readers who enjoyed Sidespace by G.S. Jennsen also liked the following books featuring the same tropes, story themes, relationship dynamics and character types.

science fiction  aliens  military  war

  • Catalyst by Fletcher DeLancey

    Catalyst by Fletcher DeLancey

    Rated: 4.72 of 5 stars
    · 14 ratings
    After disobeying orders and saving the planet of Alsea from invasion, Captain Ekatya Serrado returns home a hero and renegade, alongside Dr. Lhyn Rivers, now the foremost authority on a culture that fascinates and terrifies. They share a secret: they are tyrees, linked by an Alsean empathic bond that should be biologically impossible for two Gaians...
    Categorized as:
    military  aliens  science fiction  f-f  queer  length-long
  • Miles, Mystery & Mayhem (Vorkosigan Saga (Publication Order) #3, 5.2 &  9) by Lois McMaster Bujold

    Miles, Mystery & Mayhem (Vorkosigan Saga (Publication Order) #3, 5.2 & 9) by Lois McMaster Bujold

    Rated: 4.38 of 5 stars
    · 28 ratings
    Diplomat, soldier, spy - Lieutenant Lord Miles Naismith Vorkosigan of the Barrayarayan Empire, a.k.a. Admiral Naismith of the Dendarii Free Mercenaries, is a young man of many parts...
  • Sponsored links
  • The Vor Game by Lois McMaster Bujold

    The Vor Game by Lois McMaster Bujold

    Rated: 4.25 of 5 stars
    · 50 ratings
    Hugo Award Winner! Miles Vorkosigan graduates from the Academy, joins a mutiny, is placed under house arrest, goes on a secret mission, reconnects with his loyal Dendarii Mercenaries, rescues his Emperor, and thwarts an interstellar war. Situation normal, if you're Miles...
  • Resolve by Jenny Schwartz

    Resolve by Jenny Schwartz

    Rated: 4.37 of 5 stars
    · 25 ratings
    The unmissable conclusion to the science fiction series that has it all—ancient aliens, rogue AIs, beleaguered royalty, semi-repentant pirates, and the chance to go where no humans have gone before (well, not for five hundred years)—all wrapped up in the possibility of a happy-ever-after for everyone (bad guys excluded)...
  • Resilience by Fletcher DeLancey

    Resilience by Fletcher DeLancey

    Rated: 4.74 of 5 stars
    · 10 ratings
    As the first Alsean to serve aboard a Protectorate warship, Rahel Sayana thought her empathic sense would be an advantage. She never imagined it could be a weakness.Captain Ekatya Serrado has her hands full with a new empathic officer, an attempted murder, and a missing cargo ship. Finding the lost ship only adds to her problems: its crew lies dead amid signs of alien predators...
  • Relativity by G.S. Jennsen

    Relativity by G.S. Jennsen

    Rated: 4.59 of 5 stars
    · 12 ratings
    “I’d tell you to be careful, but we wouldn’t be here if you’d ever taken that advice. No reason to start now, right?”For millennia the Anadens have ruled the known universe. They believe they’ve crafted the perfect empire, ordered and impervious to challenge. They believe the fight has been crushed out of the species they subjugate. They are wrong.It’s a suicide mission, without a doubt...
    Categorized as:
    military  war  aliens  science fiction  length-long
  • Destin's Hold by S.E. Smith

    Destin's Hold by S.E. Smith

    Rated: 4.41 of 5 stars
    · Steam rating: 3 of 5
    Open door [?] · 16 ratings
    Internationally acclaimed, New York Times and USA TODAY bestselling author of Science Fiction, Urban Fantasy, and Paranormal Romance, S.E. Smith, brings another action, adventure, and suspense-filled story to transport readers out of this world! Destin Parks will do whatever it takes to rebuild the city he calls home, even if it means working with another alien ambassador...
  • Transcendence by G.S. Jennsen

    Transcendence by G.S. Jennsen

    Rated: 4.30 of 5 stars
    · 23 ratings
    What does it mean to be human? What if the price of saving humanity is giving up your own? The year is 2322, and we stand upon the precipice of extinction. The invading Metigen armada has decimated the eastern third of settled space in a matter of days, leaving tens of millions dead...
    Categorized as:
    aliens  military  war  science fiction  length-long
  • Galactic Gladiators Set: Books 4-6 by Anna Hackett

    Galactic Gladiators Set: Books 4-6 by Anna Hackett

    Rated: 4.75 of 5 stars
    · 8 ratings
    Fighting for love, honor, and freedom on the galaxy’s lawless outer rim…When several women from Earth find themselves abducted from a space station by alien slavers, life becomes a battle for survival on a dangerous desert planet...
  • Galactic Gladiators Set: Books 7-9 by Anna Hackett

    Galactic Gladiators Set: Books 7-9 by Anna Hackett

    Rated: 4.75 of 5 stars
    · 8 ratings
    Fighting for love, honor, and freedom on the galaxy’s lawless outer rim…When several women from Earth find themselves abducted from a space station by alien slavers, life becomes a battle for survival on a dangerous desert planet.Includes:Beast: Rescued by gladiators on the alien world of Carthago, starship pilot Mia is working to find other abducted humans who are still lost...
    Categorized as:
    military  aliens  science fiction  length-long  m-f
  • The Vixen War Bride by Thomas J. Doscher

    The Vixen War Bride by Thomas J. Doscher

    Rated: 4.67 of 5 stars
    · 9 ratings
    With the destruction of their home colony, Captain Ben Gibson and his Army Rangers have nowhere else to go. Six months after humanity’s victory in Earth’s first ever interstellar war, a group of soldiers are tasked with running a convoy refueling base in a rural part of the occupied enemy world...
  • Doubt by Jenny Schwartz

    Doubt by Jenny Schwartz

    Rated: 4.25 of 5 stars
    · 28 ratings
    Alien mysteries. Parental responsibilities. The scout ship Kangaroo has jumped into trouble.Nora Devi intended to leave her old life behind. But when a quick detour to acquire the funds for a new identity goes awry, she finds herself plunged ever deeper into the troubles she hoped to avoid.The Human Sector is a stash of fuel cells just waiting for a spark to explode...
  • The Borders of Infinity by Lois McMaster Bujold

    The Borders of Infinity by Lois McMaster Bujold

    Rated: 4.18 of 5 stars
    · 42 ratings
    [A Miles Vorkosigan Story] Miles infiltrates a prison camp at Dagoola IV, where he plots from within to free the prisoners. [Publisher's Note: The Borders of Infinity was originally published as a stand-alone novella in the anthology Free Lancers in September 1987. It was then included in the novel Borders of Infinity (October 1989). For the novel, Ms...
  • Abysm by G.S. Jennsen

    Abysm by G.S. Jennsen

    Rated: 4.53 of 5 stars
    · 11 ratings
    In the quest to be the masters of their own fate, will humanity rise to become liberators or follow the path of their ancestors into darkness?Alex Solovy and Caleb Marano risked everything to learn the hidden purpose behind the Metigen's multiverse portal network, but nothing could have prepared them for the answer...
    Categorized as:
    military  aliens  war  science fiction  length-long
  • The Caphenon by Fletcher DeLancey

    The Caphenon by Fletcher DeLancey

    Rated: 4.32 of 5 stars
    · 18 ratings
    A split-second decision to save a civilization. Another decision to give it away. Captain Ekatya Serrado has spent her career fighting the Voloth, who view less advanced civilizations as fuel for their empire. The choice between saving her ship or a world under attack is easy. The choices that come after are harder...
    Categorized as:
    aliens  military  war  science fiction  f-f  queer  length-long
  • Cajole by Jenny Schwartz

    Cajole by Jenny Schwartz

    Rated: 4.30 of 5 stars
    · 19 ratings
    If life on the border was complicated, life on Capitoline is insane. Nora and Liam struggle to reconcile her abilities and his duty, while caught up in the dangerous games of the powerful.Political intrigue, family drama, and ancient alien technology combine in the fourth novel of the Human Sector...
  • Holdouts by Thomas J. Doscher

    Holdouts by Thomas J. Doscher

    Rated: 4.71 of 5 stars
    · 7 ratings
    It just got awkward... With the Va'Shen villagers home safe, Army Ranger Captain Ben Gibson is ready to settle in for an easy deployment overseeing a sleepy refueling base on the occupied enemy homeworld and its small contingent of soldiers and sailors...
  • Going Ballistic by Dorothy Grant

    Going Ballistic by Dorothy Grant

    Rated: 4.63 of 5 stars
    · 8 ratings
    When her plane tries to come apart at apogee during a hijack, ballistic airline pilot Michelle Lauden handles the worst day she could imagine. After getting down without losing any passengers or crew, though, she finds her troubles have just begun!The country she's landed in has just declared independence from the Federation...
  • Dark Strength by Cynthia Sax, Amanda Kelsey

    Dark Strength by Cynthia Sax, Amanda Kelsey

    Rated: 4.56 of 5 stars
    · 9 ratings
    The Bigger They Are, The Harder They Fall. Balvan, the Refuge’s Gatekeeper, is huge, green, and has a reputation for crushing skulls. He’s a modified humanoid, genetically designed to be the ultimate warrior. One of a kind and considered monstrous by many, he never expects to find his mate, the one female meant for him...
    Categorized as:
    military  aliens  futuristic  science fiction  m-f
  • Rubicon by G.S. Jennsen

    Rubicon by G.S. Jennsen

    Rated: 4.56 of 5 stars
    · 9 ratings
    “We are you—the you that you could have been.”The Anaden Directorate has ruled Amaranthe for millennia, subjugating species and galaxies in a neverending quest for control and order. For as many millennia, the anarchs have rebelled, defiantly claiming their own freedom yet without hope of winning it for everyone...
    Categorized as:
    military  war  aliens  science fiction  length-long
  • Requiem by G.S. Jennsen

    Requiem by G.S. Jennsen

    Rated: 4.56 of 5 stars
    · 9 ratings
    The end of the world began with a library query…how will it conclude?What began as a chance discovery of an anomalous signal is now a multiverse war between humanity and its genetic ancestors over who controls the levers of life and death. Over who decides what life is and whether it will be allowed to exist. For the ruling Anaden Directorate, victory means immortality...
    Categorized as:
    military  war  aliens  science fiction  length-long
  • Astray by Jenny Schwartz

    Astray by Jenny Schwartz

    Rated: 4.20 of 5 stars
    · 28 ratings
    Nora Devi is a xeno-archaeologist with a complicated past. She has buried more secrets than she’s dug up. Widowed in the recently ended twelve year war between Capitoline and Palantine, she now makes a living as an independent tagger in border space.Captain Liam Kimani could be credited with ending the latest royal war. Instead, he’s blamed for it...
  • Lyel by Ava Ross

    Lyel by Ava Ross

    Rated: 4.42 of 5 stars
    · 12 ratings
    An alien warrior seeking redemption meets a captured Earth woman being treated as a pet. Will their love survive in a hostile world? Kidnapped by four-armed, blue skinned aliens, Isabelle “Isi” is sold to the head of the Al’kieern kidnapping operation. Isi has accepted she’ll live and die as a songbird pet to the queen. If nothing else, performing for the Al’kieern beats being sold as a breeder...
  • Diplomatic Immunity by Lois McMaster Bujold

    Diplomatic Immunity by Lois McMaster Bujold

    Rated: 4.13 of 5 stars
    · 45 ratings
    Returning from their honeymoon on Earth, Miles and Ekaterin stop at one of the asteroid-based habitats informally known as Quaddiespace (see FALLING FREE), where Miles is sent to defuse an incident between a Barryaran military command and the local police...
  • Zakota by Ruby Lionsdrake

    Zakota by Ruby Lionsdrake

    Rated: 4.44 of 5 stars
    · 11 ratings
    Katie Saunders isn’t used to sitting on her butt, but she’s been stuck doing exactly that as the Star Guardians fly all over the galaxy, trying to get her and the other kidnapped women back home. Now it looks like they have to engage in a battle against evil aliens before making the final flight to Earth. Since they’ve captured an extra ship and are short on pilots, Katie wants to help...
  • Dom by Anna Hackett

    Dom by Anna Hackett

    Rated: 4.36 of 5 stars
    · 13 ratings
    As the battle against the invading aliens intensifies, a group of bad boy bikers and mercenaries will stand and fight for humanity’s survival… Squad Three berserker Dom Santora has an ugly past he can’t forget. Born and raised in the darkness, he spent his life before the alien invasion as a Mafia enforcer...
  • Cupcake Girls by Thomas J. Doscher

    Cupcake Girls by Thomas J. Doscher

    Rated: 4.80 of 5 stars
    · Steam rating: 2 of 5
    Behind closed doors [?] · 5 ratings
    A month has passed since Captain Ben Gibson arranged for the return of the village's missing commandos, and relations between the Rangers and the local alien community have never been better. As the two sides work together to prepare for the arrival of a group of refugees, he and the Va'Shen priestess, Alacea, work on exploring their budding personal relationship...
  • Faith, Part 3 by Grace Goodwin

    Faith, Part 3 by Grace Goodwin

    Rated: 4.67 of 5 stars
    · 6 ratings
    The traitor within the Jax household has been found, and the repercussions are staggering, with Faith barely surviving and their mating destroyed. But Faith has always been unpredictable—just ask her sisters— and nothing will stop her from getting what she wants…and she wants Thor. Even if it kills her...
  • Aeson: Black by Vera Nazarian

    Aeson: Black by Vera Nazarian

    Rated: 4.67 of 5 stars
    · 6 ratings
    Prince, soldier, hero of Atlantis.Haunted by death and the blue eyes of a stranger.Faced with an impossible choice.Love or Duty.Aeson Kassiopei, Imperial Crown Prince, survived his fiery death at Ae-Leiterra, saved the Fleet, and became the man we know today...
  • Galactic Gladiators Set: Books 10-12 by Anna Hackett

    Galactic Gladiators Set: Books 10-12 by Anna Hackett

    Rated: 4.67 of 5 stars
    · 6 ratings
    Fighting for love, honor, and freedom on the galaxy’s lawless outer rim…When several women from Earth find themselves abducted from a space station by alien slavers, life becomes a battle for survival on a dangerous desert planet...
    Categorized as:
    military  aliens  science fiction  length-long  m-f
  • The Last Symbiotes 2: Living Starship by Dante King

    The Last Symbiotes 2: Living Starship by Dante King

    Rated: 4.50 of 5 stars
    · 8 ratings
    James Decker, captain of the living starship Farrago, has a mission: locate the seven symbiotes scattered across space. This mission will bring him credits beyond his imaginations, but it could also save the universe.He has found three, but there are still four more out there.And all the while, the strange faceless man from the Cloud Sea is never far away...
  • Collision Course: A Class 5 Novel by Michelle Diener

    Collision Course: A Class 5 Novel by Michelle Diener

    Rated: 4.50 of 5 stars
    · 8 ratings
    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...
  • Amaranthe II: Rebellion by G.S. Jennsen

    Amaranthe II: Rebellion by G.S. Jennsen

    Rated: 4.44 of 5 stars
    · 9 ratings
    AMARANTHE II: REBELLION is jam-packed with over 1,200 pages of Sci-Fi Adventure**Includes the Aurora Renegades trilogy (Sidespace, Dissonance, Abysm), the 2nd trilogy in the Amaranthe universe, + a short story + bonus content)**It is a time of accelerating technological change & shifting allegiances as the old rules fall away & the old balance of power is upended...
  • Alien Duke's Fated Mate by Mina Carter

    Alien Duke's Fated Mate by Mina Carter

    Rated: 4.35 of 5 stars
    · Steam rating: 4 of 5
    Explicit open door [?] · 10 ratings
    She's the best pilot in the galaxy... He's an arrogant alien dukeMajor Zara Reid has one mission - prove human pilots can fly alongside the alien Latharians. She didn’t expect their arrogant Lord Starfighter to try and undermine her at every turn...
  • Defying Fate by Regine Abel

    Defying Fate by Regine Abel

    Rated: 4.40 of 5 stars
    · 10 ratings
    No more secrets. No more lies.For the past eight years, Tevek has searched for his missing mother and sister. But as a top technological mind of Guldar, he is closely watched. And as one of the secret leaders of the rebellion, he must tread carefully...
  • Damnation by Jean Johnson

    Damnation by Jean Johnson

    Rated: 4.19 of 5 stars
    · 21 ratings
    It began with a terrible vision of the future. Compelled by her precognitive abilities, Ia must somehow save her home galaxy long after she’s gone...
  • A Very Arcav Christmas by Hope Hart

    A Very Arcav Christmas by Hope Hart

    Rated: 4.39 of 5 stars
    · 10 ratings
    Babies, weddings, and Christmas... oh my! For the human women on Arcavia, there's plenty to celebrate during the holidays. Sure, the Grivath are a constant threat, but with a surprise wedding to plan, a baby on the way, and even a visit from Santa, the first Arcav Christmas is sure to be incredible...
  • Bound by Tana Stone

    Bound by Tana Stone

    Rated: 4.30 of 5 stars
    · 13 ratings
    She’s been given a choice. Mate with the part-cyborg alien who abducted her. Or die. For Shreya, taking an alien for a mate was never in the cards. As one of the human women who rejected the idea of being a tribute bride to the Drexian warriors, she was just fine without a big, hulking alien. Even if they are gorgeous...
  • Heretic by C. Gockel

    Heretic by C. Gockel

    Rated: 4.29 of 5 stars
    · 12 ratings
    The day of reckoning is coming … Commander Noa Sato has almost reached the Kannukah Cloud. Within hours her crew may be able to reach Sol System through a hidden time gate. If they make it, she and her crew won’t just save their own lives--they’ll save millions from genocide at the hands of Luddeccean fanatics. But the Luddeccean "fanatics" may not be as mad as Noa believes...
    Categorized as:
    aliens  war  science fiction  length-medium
  • Sagitta by Ruby Lionsdrake

    Sagitta by Ruby Lionsdrake

    Rated: 4.20 of 5 stars
    · 17 ratings
    Dr. Tala Matapang thought the most challenging part about getting kidnapped by slavers from another planet would be escaping, not butting heads with the obstinate Star Guardian captain who rescued her. She’s been working in his sickbay, and it's refreshing not having to deal with the politics and bureaucracy she faced as a surgeon back home, but Captain Sagitta is as infuriating as he is handsome...
  • Weapons Master by Anna Hackett

    Weapons Master by Anna Hackett

    Rated: 4.21 of 5 stars
    · 16 ratings
    A grumpy cyborg weapons master collides with a feisty mechanic from Earth who turns his ordered existence upside down.Abducted from her exploration ship and enslaved on a desert world, mechanic Bellamy Walsh has fought for her survival. She’s had to fight for everything in her life, and she doesn’t ever expect things to be easy...
  • Starfighter Command: Game 2 by Grace Goodwin

    Starfighter Command: Game 2 by Grace Goodwin

    Rated: 4.33 of 5 stars
    · 10 ratings
    I'm obsessed with the game.I spend so many hours playing that I dream about dangerous missions on other worlds...and my gorgeous, in-game training partner, Kassius. That is, until I win. I beat the Starfighter Training Academy...
  • Hardship by Jean Johnson

    Hardship by Jean Johnson

    Rated: 4.16 of 5 stars
    · 20 ratings
    It began with a terrible vision of the future. Compelled by her precognitive abilities, Ia must somehow save her home galaxy long after she’s gone. Now Jean Johnson presents the long-awaited epic conclusion to her national bestselling military science fiction series… Demoralized, their ship destroyed, Ia’s Damned must fight their way out of a planet-bound blockade and back into space...
  • An Officer's Duty by Jean Johnson

    An Officer's Duty by Jean Johnson

    Rated: 4.13 of 5 stars
    · 24 ratings
    Jean Johnson—the national bestselling author of the Sons of Destiny novels—returns to the world she introduced in A Soldier’s Duty with a terrible vision of the future... Promoted in the field for courage and leadership under fire, Ia is now poised to become an officer in the Space Force Navy—once she undertakes her Academy training...
  • Manu by Anna Hackett

    Manu by Anna Hackett

    Rated: 4.28 of 5 stars
    · 11 ratings
    As the battle against the invading aliens intensifies, a group of bad boy bikers and mercenaries will stand and fight for humanity’s survival… When former berserker Manu Rahia lost his leg on a mission, he was forced to leave his squad...
    Categorized as:
    aliens  military  futuristic  science fiction  m-f
  • Exin Ex Machina by G.S. Jennsen

    Exin Ex Machina by G.S. Jennsen

    Rated: 4.28 of 5 stars
    · 11 ratings
    When man and machine are one and the same, there are many crimes but only one sin: psyche-wipe. The secrets it has buried could lead to a civilization's salvation, or to its doom.The Asterion Dominion is at peace with its neighbors and itself. Its citizens enjoy great freedoms and all the luxuries their biosynthetic minds can imagine, design and create...
  • Rescued by the Zandian by Renee Rose, Rebel West

    Rescued by the Zandian by Renee Rose, Rebel West

    Rated: 4.33 of 5 stars
    · 9 ratings
    Humans lie.I learned that lesson once before.I thought I found a mate, but she betrayed us all.I won't let that happen again.Not even when I find Sia and four other females nearly dead on a defunct planet.Not when the lovely female is remanded to my custody.She's not being honest about what she knows.But with a little pressure, a little punishment, I might get her to talk.Teach her to obey...
  • Soros by Vi Voxley

    Soros by Vi Voxley

    Rated: 4.38 of 5 stars
    · 8 ratings
    The worst is yet to come... Kat Edwards is a woman who doesn't consider failure as an option. As a bounty hunter, she's seen the worst that the galaxy has to offer and she's not afraid of it. Or, at least she thought she'd seen the worst. But a certain Corgan warlord might just change her mind on that. Soros is more myth than man...
    Categorized as:
    aliens  military  science fiction  futuristic
  • Bane's Heart by Michelle Howard

    Bane's Heart by Michelle Howard

    Rated: 4.38 of 5 stars
    · 8 ratings
    Bane Hardusho is one of the famed Jutak Warriors from Team Three fighting for justice. When a potential career ending injury sidelines him, his position within the elite group is jeopardized. A military rehab center holds the only hope of helping him to get back on his feet. He should be concentrating on regaining his ability to walk, not the beautiful medic assistant assigned to help him...
  • Invasion by Sarah Hawke

    Invasion by Sarah Hawke

    Rated: 4.38 of 5 stars
    · Steam rating: 5 of 5
    Explicit and plentiful [?] · 8 ratings
    After two centuries, the fearsome Dowd—a race of faceless monsters once thought banished beyond the Veil—have returned. And no one in the Tartarus Cluster is aware of the coming onslaught.No one…except for Major Kal Zeris and the women fighting at his side...
Fantastic book recommendations by romance book lovers for romance book lovers.
Find out more about romance.io.


Get recommendations by genres & tropes

Use the romance book finder to mix and match over 100 content keywords to find the books that match your preferences

romance book finder

Looking for more inspiration? Enter another book title to get more suggestions on what to read next.


Or - use our amazing romance book finder to get recommendations based on your favorite content tropes and themes. Mix and match at will.