Books like 'Rubicon'
Readers who enjoyed Rubicon by G.S. Jennsen also liked the following books featuring the same tropes, story themes, relationship dynamics and character types.
sc-fi romance space action / adventure military, war & conflict space-opera war military ai aliens
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Forever Defend by Michael Anderle, Emily Beresford
Rated: 4.52 of 5 stars · 26 ratingsSome forget why she was called the Queen Bitch. Not Anymore. Bethany Anne is going stir crazy after more than a decade of having to be 'The Empress.' Now, her advisors have to deal with an Empress who is determined to be on the front line.The Ixtali's come to the Etheric Empire, hat in hand.Nathan decides that the best way to handle soft intelligence, is to create a new company... -
![King of Eon by Anna Hackett]()
King of Eon by Anna Hackett
Rated: 4.59 of 5 stars · 15 ratingsThe King of the Eon Warriors has decided to take a Terran as his bride…but finds himself shockingly attracted to the tough, beautiful Space Corps officer in charge of his potential brides’ security.King Gayel Solann-Eon is dedicated to his people and empire. His father was a hard man and a rigid king, but Gayel is doing things his own way... -
![The Ceph Sector by Jenny Schwartz]()
The Ceph Sector by Jenny Schwartz
Rated: 4.50 of 5 stars · 8 ratingsThe legendary Ceph have been in stasis for forty two millennia. In a century, they’ll wake. History remembers them as an unstoppable force, employing a mysterious power to decimate sentient life on the planets they attacked. Jaya’s first mission as a new Shaman Justice is to lead an expedition into the perilous Ceph Sector...Categorized as:
aliens colonization cyberpunk exploration first-contact galactic-empire invasion military -
![Combust by Tana Stone]()
Combust by Tana Stone
Rated: 4.50 of 5 stars · 8 ratingsThe Drexian warrior is brooding and mysterious--and he's claimed me as his tribute.When I don't marry his nephew, I have no idea I'm still promised to Zoran's clan. Imagine my shock when the dark and imposing alien informs me that he will be taking me as his tribute bride--and taking me back to the Drexian home world with him... -
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![Lost Stars by Claudia Gray]()
Lost Stars by Claudia Gray
Rated: 4.28 of 5 stars · 40 ratingsThis thrilling Young Adult novel gives readers a macro view of some of the most important events in the Star Wars universe, from the rise of the Rebellion to the fall of the Empire. Readers will experience these major moments through the eyes of two childhood friends--Ciena Ree and Thane Kyrell--who have grown up to become an Imperial officer and a Rebel pilot... -
![Memento by Amie Kaufman, Jay Kristoff]()
Memento by Amie Kaufman, Jay Kristoff
Rated: 4.33 of 5 stars · 31 ratingsFrom New York Times bestselling authors Amie Kaufman and Jay Kristoff comes an Illuminae prequel digital novella that gives readers a hair-raising glimpse into the calamity that befell the invincible AI system known as AIDAN–and the daring young programmer who would risk her life to keep it from crashing.AIDAN is the AI you’ll love to hate... -
![Between Worlds by J.L. Williams]()
Between Worlds by J.L. Williams
Rated: 4.40 of 5 stars · 10 ratingsInspired by the likes of James Galloway's Subjugation and John Scalzi's Old Man's War, Between Worlds is a thrilling military sci-fi set in a strange new universe...Jason had thought about punching a Shil’vati...Categorized as:
aliens first-contact galactic-empire invasion military soldiers space-fleet space-opera -
![Lost: A Christmas Novella by Jenny Schwartz]()
Lost: A Christmas Novella by Jenny Schwartz
Rated: 4.40 of 5 stars · 10 ratingsMerry Christmas, son. Don’t come home. Stuck on Central Transit Station, Sergeant Ryan Dabrowski receives a Dear John letter from his family. The home he fought to protect doesn’t want him. He’s left too much of his body out among the stars. The aug-doctors patched him up better than new, but cyborg freaks aren’t welcome on Earth.“Don’t ruin your sister’s life...Categorized as:
space-opera colonization soldiers cyberpunk galactic-empire first-contact military sci-fi -
![Transcendence by G.S. Jennsen]()
Transcendence by G.S. Jennsen
Rated: 4.33 of 5 stars · 12 ratingsWhat 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... -
![Kiss of Eon by Anna Hackett]()
Kiss of Eon by Anna Hackett
Rated: 4.38 of 5 stars · 23 ratingsWhen the vital alliance between Earth and the Eon Empire depends on her playing war games with an arrogant, infuriating Eon warrior, what could go wrong? Terran Captain Allie Borden has her orders. Take her ship, the Divergent, and strengthen the alliance with the Eon by carrying out training exercises with the Eon warship, the Desteron... -
![Heart of Eon by Anna Hackett]()
Heart of Eon by Anna Hackett
Rated: 4.37 of 5 stars · 23 ratingsOkay, maybe hijacking an alien commander’s warship wasn’t her best idea… Genius computer geek Wren Traynor prefers her high-tech comp lab to socializing with people, and she definitely prefers it over crawling through the bowels of the huge Eon warship she’s hijacked... -
![Confederation by Michael R. Hicks]()
Confederation by Michael R. Hicks
Rated: 4.25 of 5 stars · 16 ratingsIn the second book of the In Her Name science fiction & fantasy series, Reza Gard has been banished from the Kreelan Empire and is once again a stranger in a strange land as he returns to the human Confederation. Befriended by a marooned Confederation naval officer leading a desperate fight against the Kreelans on a distant colony world, she reunites Reza with Nicole Carré... -
![Barrayar by Lois McMaster Bujold]()
Barrayar by Lois McMaster Bujold
Rated: 4.24 of 5 stars · 39 ratingsCordelia and Arol Vorkosigan's plans for a peaceful married life (after all the bloodshed and trials recounted in SHARDS OF HONOR) are soon shattered by the polital tumult on Barrayar. Resisting enormous pressure, they struggle to keep their family alive while while protecting the child Emperor from enemies who would murder him and assume absolute power over all of Barrayar... -
![Mark of Eon by Anna Hackett]()
Mark of Eon by Anna Hackett
Rated: 4.38 of 5 stars · 21 ratingsOil and water. Fire and ice. Terran space marine and rugged alien warrior.Space marine Lieutenant Jamie Park has a reputation as tough as steel...just the way she likes it. A horrible childhood and her marine training have forged her into a strong woman, and she's never seen a fight she'd back down from... -
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![Relativity by G.S. Jennsen]()
Relativity by G.S. Jennsen
Rated: 4.50 of 5 stars · 6 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... -
![Abysm by G.S. Jennsen]()
Abysm by G.S. Jennsen
Rated: 4.50 of 5 stars · 6 ratingsIn 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... -
![Requiem by G.S. Jennsen]()
Requiem by G.S. Jennsen
Rated: 4.50 of 5 stars · 6 ratingsThe 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... -
![Of A Darker Void by G.S. Jennsen]()
Of A Darker Void by G.S. Jennsen
Rated: 4.50 of 5 stars · 6 ratingsWhen man and machine are one and the same, death is no longer an inevitability. But in the darkest reaches of space, neither is life.Diplomat. Rebel. Fugitive. Nika Tescarav has lived many lives, though she no longer remembers most of them...Categorized as:
aliens colonization cyberpunk exploration family first-contact friendship galactic-empire -
![Roklyn by Alana Khan]()
Roklyn by Alana Khan
Rated: 4.50 of 5 stars · 6 ratingsTo stay alive, Roklyn buried his emotions. Can he risk everything to trust the ailing Earth girl he’s sworn to protect?PaigeI’ve come to this medical center to save my life. My grumpy but intriguing bodyguard can receive services also, but only if he’s my “mate...Categorized as:
aliens galactic-empire space-travel first-contact invasion romance paranormal fated-mates -
![Keran's Dawn by Regine Abel]()
Keran's Dawn by Regine Abel
Rated: 4.50 of 5 stars · 6 ratingsFor the people and the crown.When Dawn took over the management of the Braxian hybrid shelter on the sanctuary planet Haven, she never thought its last days would be marked by a series of gruesome murders against its patrons. With local law enforcement failing to capture the murderer, she makes a desperate plea for help to the Braxian Crown Prince, Keran Xeldar...Categorized as:
aliens invasion soldiers military space-opera colonization space-fleet first-contact -
![Capital Games by R.K. Thorne]()
Capital Games by R.K. Thorne
Rated: 4.43 of 5 stars · 7 ratingsTwo months have passed since Commander Ellen Ryu did the impossible and rescued mercenary Kael Sidassian—along with his mysterious cargo. Now the crew of Audacity is stronger than ever, protecting the galaxy against the abuse of technology...Categorized as:
space-opera soldiers galactic-empire military sci-fi slow-burn space action-adventure -
![Lyel by Ava Ross]()
Lyel by Ava Ross
Rated: 4.38 of 5 stars · 8 ratingsAn 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... -
![Dissonance by G.S. Jennsen]()
Dissonance by G.S. Jennsen
Rated: 4.38 of 5 stars · 8 ratingsKnow this: you need not be afraid. They own the fear. They fear us because they believe we are powerful, and they are correct to do so. The technology behind Project Noetica is on the loose. Prevos—individuals and AIs sharing a single body—are spreading across the galaxy... -
![Sidespace by G.S. Jennsen]()
Sidespace by G.S. Jennsen
Rated: 4.38 of 5 stars · 8 ratingsHumanity is saved. But its troubles are just beginning. To achieve their extraordinary triumph over the invading Metigen armada, humanity put aside its myriad of political and social conflicts and united against a common foe intent on annihilating civilization. In victory, unparalleled peace and prosperity are theirs for the taking—if they can keep hold of them... -
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![Dragon's Heart by Miranda Martin]()
Dragon's Heart by Miranda Martin
Rated: 4.38 of 5 stars · 8 ratingsKate has had enough. Her research pod went down after the Generation ship crashed and now she's stuck on the steaming hot hell that is Tajss. The handful of people that survived initial contact with the planet's monstrous creatures have been forced underground into darkness. Worse is Annabel, self-appointed tyrannical leader of their small group...Categorized as:
aliens colonization first-contact galactic-empire invasion action-adventure adult book -
![Saved by the Stryxian by Ella Blake]()
Saved by the Stryxian by Ella Blake
Rated: 4.30 of 5 stars · 10 ratingsWhen Brandy Trentler’s wealthy family insists she marry the jerk who cheated on her, she signs up for the Stryxian mate lottery. Who knew her number would be drawn in the first round? Nothing goes right after that—the transport ship is attacked, she is captured by the enemy Morr-ta aliens and thrown in prison... -
![Earth Husbands are Odd by Lyn Gala]()
Earth Husbands are Odd by Lyn Gala
Rated: 4.30 of 5 stars · 10 ratingsMax, the stranded Earth pilot, and Rick, his tentacled partner in love, are forced to return to a universe that dismisses Rick as an asymmetrical, loud outcast. But Rick hasn't told Max the whole story. Max wants to live in a universe where his children and his lover are respected and given a chance to shine. He doesn’t know the odds are stacked against them... -
![Taji from Beyond the Rings by R. Cooper]()
Taji from Beyond the Rings by R. Cooper
Rated: 4.30 of 5 stars · 10 ratingsThe Interplanetary Trade Coalition has not been welcomed with open arms by the Sha Empire. Isolated at the far edge of a distant system, the Sha are distrustful of outsiders, and previous I.P.T.C. diplomatic missions have ended with members imprisoned or dead. But, if pushed enough, the I.P.T.C. will overrun the planet to take what it wants... -
![Daylight by Cheree Alsop]()
Daylight by Cheree Alsop
Rated: 4.30 of 5 stars · 10 ratingsLiora Day’s fate entwined with the crew the day she joined the SS Kratos. Fleeing the Coalition in their attempt to destroy the Omne Occasus before it falls into the wrong hands, the captain and crew band together to save not only their ship, but the fate of the Macrocosm against those who would use the machine for harm...Categorized as:
aliens invasion military soldiers space-fleet space-opera space-travel action-adventure -
![The Caphenon by Fletcher DeLancey]()
The Caphenon by Fletcher DeLancey
Rated: 4.48 of 5 stars · 14 ratingsOn a summer night like any other, an emergency call sounds in the quarters of Andira Tal, Lancer of Alsea. The news is shocking: not only is there other intelligent life in the universe, but it’s landing on the planet right now.Tal leads the first responding team and ends up rescuing aliens who have a frightening story to tell... -
![Escaping Fate by Regine Abel]()
Escaping Fate by Regine Abel
Rated: 4.25 of 5 stars · 12 ratingsEnslaved. Exploited. Hunted.Born and raised on a slavers ship, Amalia is one of the rare survivors of the Veredian race. Like all Veredian females, Amalia possesses a unique psi ability which makes her the prized pet of her master Gruuk. She escapes to Xelix Prime, a warrior planet where slavery is prohibited...Categorized as:
aliens colonization first-contact invasion military soldiers space-fleet action-adventure -
![Chasing the Shadows by Maria V. Snyder]()
Chasing the Shadows by Maria V. Snyder
Rated: 4.29 of 5 stars · 24 ratingsYear 2522. Lyra Daniels is dead.Okay, so I only died for sixty-six seconds. But when I came back to life, I got a brand new name and a snazzy new uniform. Go me! Seriously, though, it's very important that Lyra Daniels stays dead, at least as far as my ex-friend Jarren, the murdering looter, knows.While dying is the scariest thing that's happened to me, it morphed my worming skills...Categorized as:
aliens family first-contact invasion space-opera space-travel action-adventure archaeology -
![Tansy's Titan by S.E. Smith]()
Tansy's Titan by S.E. Smith
Rated: 4.19 of 5 stars · 16 ratingsTansy Bell, is the middle daughter of the three Bell sisters. She has always been a little different, even for a Bell. A chameleon, she can change her appearance and personality to blend in almost anywhere. She uses this talent to bring some of the worse criminals in the world to justice.Mak ‘Tag Krell Manok is the wild one of his four brothers...Categorized as:
aliens first-contact invasion military soldiers space-fleet space-opera action-adventure -
![Final Battle by Michael R. Hicks]()
Final Battle by Michael R. Hicks
Rated: 4.19 of 5 stars · 16 ratingsFollowing Confederation, Final Battle is the last book in the saga of Reza Gard. Reza is caught up in a daring plot to assassinate the Confederation President, even as something goes terribly wrong in the Empire and its warriors lose their will to fight. Reunited with Tesh-Dar, Reza and his friends fight to save the woman he loves, with the fate of the Empire and Humanity hanging in the balance... -
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![Claim of Eon by Anna Hackett]()
Claim of Eon by Anna Hackett
Rated: 4.40 of 5 stars · 15 ratingsShe’s an alien warrior dedicated to her job, but a tough, handsome Terran captain is a temptation she never expected.As a female Eon warrior, Second Commander Airen Kann-Felis has fought for her career and is proud of her work aboard the warship, the Rengard. She has no time for men or frivolous pleasures, especially with the deadly insectoid Kantos causing the Eon trouble at every turn... -
![Pregnant by the Alien Healer by Mina Carter]()
Pregnant by the Alien Healer by Mina Carter
Rated: 4.26 of 5 stars · 24 ratingsShe’s pregnant without nookie. Someone slap her ass and call her Mary… A ‘guest’ of the Lathar, Jess has become used to being at court, especially as it allows her to be close to a certain tall, handsome healer. But Laarn might as well not know she exists, far more interested in his tests and her genetic code than her as a woman… maybe...Categorized as:
aliens colonization exploration first-contact galactic-empire invasion military space-fleet -
![Edge of Eon by Anna Hackett]()
Edge of Eon by Anna Hackett
Rated: 4.24 of 5 stars · 26 ratingsFramed for a crime she didn't commit, a wrongly-imprisoned space captain's only chance at freedom is to abduct a fearsome alien war commander. Sub-Captain Eve Traynor knows a suicide mission when she sees one. With deadly insectoid aliens threatening to invade Earth, the planet’s only chance of survival is to get the attention of the fierce Eon Warriors... -
![Plundered by Tana Stone]()
Plundered by Tana Stone
Rated: 4.25 of 5 stars · 23 ratingsMy sister gave herself to the raider warlord to save me. Now I’m hunting him down and getting her back.I’ve never forgiven myself for letting that brute drag her off my ship, and I’ve done nothing but search for his horde of warships since he let my ship go free...Categorized as:
aliens first-contact galactic-empire invasion military action-adventure adult alpha-mc -
![Stolen by the Zandian by Renee Rose, Rebel West]()
Stolen by the Zandian by Renee Rose, Rebel West
Rated: 4.33 of 5 stars · 6 ratingsSTOLEN FROM AUCTION Khrys My career is on the line here. King Zander demoted me.The planet is in crisis over a viral epidemic affecting the human half-breeds.If I could get my hands on the genetically modified humanshe could be the answer to both problems.But I didn’t expect to fall for the feisty little femalewho stole my heart while I stole her body. Kailani I’m an upgraded human... -
![Striking Mars by Cidney Swanson]()
Striking Mars by Cidney Swanson
Rated: 4.33 of 5 stars · 6 ratingsFleeing for their lives, Jess and Pavel make it to the Moon, narrowly avoiding the attack on Space Station 92-AE. They should be safe and happy, but they discover they are not alone on Tranquility Base. The stranger they encounter seems uniquely qualified to leak their presence to Chancellor Lucca Brezhnaya, especially when the Marsians contemplate airing Lucca's political dirty laundry... -
![Taken by Harmony Raines]()
Taken by Harmony Raines
Rated: 4.33 of 5 stars · 6 ratingsChrissi always dreamed of being an astronaut, just like her dad, devoting her whole life to Operation Saviour, the human race’s last ditch attempt to find a new home. But days before her first launch, the project was cancelled, leaving her to pick up the pieces of her life. All thanks to the arrival of the Karal... -
![Vrexus by Olivia Riley]()
Vrexus by Olivia Riley
Rated: 4.33 of 5 stars · 6 ratingsLee thinks she's safe in the silver city, safe from the monsters. But she's wrong.While on a mission for the alliance, Lee Reimer, a politician's daughter, celebrates a newly made pact with an alien race, unaware a vicious beast stalks nearby, ready to steal her away...Categorized as:
aliens exploration first-contact invasion military soldiers space-travel action-adventure -
![Baring Grudge by Cynthia Sax]()
Baring Grudge by Cynthia Sax
Rated: 4.33 of 5 stars · 6 ratingsNo one in the universe is more determined than a cyborg warrior tracking his female.***Grudge, a C Model cyborg, has been assigned a mission – safeguard a Humanoid Alliance space station for his kind. Honor was once all he had, and he is determined to fulfill his duty... -
![Stranded by the Alien Bride Lottery by Margo Bond Collins]()
Stranded by the Alien Bride Lottery by Margo Bond Collins
Rated: 4.33 of 5 stars · 6 ratingsHe's not the warrior I wanted. But now we're stranded together, and I can't quit thinking about him.I made it all the way through the Alien Bride Games without being chosen by a Khanavai male, even though I'm certain it's the only way I'll ever find anything resembling love... -
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![Dark Universe by Cheree Alsop]()
Dark Universe by Cheree Alsop
Rated: 4.33 of 5 stars · 6 ratingsCaptain Nova Ardis rescued her brother but lost her planet.As a Lady of the Accord Systems, she has to figure out the depths of betrayal before she can go home.˃˃˃ Kovak’s Life has taken a Dangerous Turn.. In helping Nova free her brother and choosing to fight the arena battle in his stead, the gladiator has made some very powerful enemies...Categorized as:
space-opera aliens invasion galactic-empire space-travel space-fleet colonization military -
![Mastered By The Zandians by Renee Rose, Rebel West]()
Mastered By The Zandians by Renee Rose, Rebel West
Rated: 4.25 of 5 stars · 8 ratingsTWO ZANDIAN WARRIORS. THEIR FEISTY HUMAN CAPTIVE. I can fly a fighter jet in my sleep and kill with the fingers of one hand. I work alone. No being in the galaxy can challenge me-- until I tangle with two Zandian warriors. They say I stole their cargo, and they plan to take me to their planet. Make me theirs. Nobody owns me... -
![Cosmic Catalyst by Jenny Schwartz]()
Cosmic Catalyst by Jenny Schwartz
Rated: 4.25 of 5 stars · 8 ratingsASIN B076PSPMHH moved to latest edition as per guidelinesEveryone has secrets. But some people will risk the galaxy to protect theirs. When starship shaman Jaya Romanov and her new mate partner, galactic bounty hunter and robot wolf shifter, Vulf Trent, saved the galaxy from the deadly actions of a determined geriatric terrorist, they forgot that old Earth truism: no good deed goes unpunished...Categorized as:
aliens cyberpunk first-contact galactic-empire invasion military soldiers space-fleet -
![Alien Warrior Untamed by Ava Ross]()
Alien Warrior Untamed by Ava Ross
Rated: 4.25 of 5 stars · 8 ratingsShe's fated to be mine, but the world is determined to steal her away.When I was twelve, I was forced to watch as an invader killed everyone I loved. He captured me and took me to the chamber, where he tortured me and the other males, desperate to twist us into a beastly army. He may have turned me into a monster, but I refused to give into his demands... -
![Between Worlds Two (The Occupation Saga Book 2) by J.L. Williams]()
Between Worlds Two (The Occupation Saga Book 2) by J.L. Williams
Rated: 4.63 of 5 stars · 8 ratingsInspired by the likes of James Galloway's Subjugation and John Scalzi's Old Man's War, Between Worlds is a thrilling military sci-fi set in a strange new universe..Categorized as:
aliens first-contact galactic-empire invasion military soldiers space-fleet space-opera -
![Unfrozen by Regine Abel]()
Unfrozen by Regine Abel
Rated: 4.20 of 5 stars · 10 ratingsWhen the penitentiary ship she's incarcerated in gets sucked into an anomaly, Lydia barely survives the crash onto an alien planet. Only the sadistic experiments performed on her by the prison's scientist allow her to survive this harsh and dangerous world. The future looks grim until she stumbles upon a magnificent city of ice and its most unusual inhabitant...
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