Books like 'Theta'
Readers who enjoyed Theta by Elsa Jade also liked the following books featuring the same tropes, story themes, relationship dynamics and character types.
futuristic sc-fi romance action / adventure aliens cyborgs military space-opera
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Planet Killer by Lindsay Buroker
Rated: 4.65 of 5 stars · 24 ratingsCasmir has survived against impossible odds, and now he longs to return home. But an invasion force is blockading the Kingdom’s wormhole gate, and it would be suicidal to fly through it now. Worse, his family and friends are stuck on the other side, with hostile forces attacking their home world. The only way Casmir can help is to find out who’s behind the invasion… and convince him to stop... -
![Gate Quest by Lindsay Buroker]()
Gate Quest by Lindsay Buroker
Rated: 4.59 of 5 stars · 27 ratingsRoboticist extraordinaire Casmir Dabrowski has a new nemesis: astroshaman leader Kyla Moonrazor. She’s stolen the ancient wormhole gate the king ordered Casmir to retrieve, and she’s entrenched in an underwater base on a forsaken moon. Moonrazor is more educated and more experienced than Casmir, and she has legions of killer robots and cyborg defenders on her side. Casmir has his friends and.. -
![Compete by Vera Nazarian]()
Compete by Vera Nazarian
Rated: 4.47 of 5 stars · 29 ratingsIt's one thing to Qualify…But do you have what it takes to Compete?With Earth about to be destroyed by an extinction level asteroid, teenage nerd, geek, and awkward smart girl Gwen Lark, and a few of her friends and loved ones, barely Qualified for rescue onboard one of the thousands of ark-ships headed to the ancient colony planet Atlantis... -
![End Game by Lindsay Buroker]()
End Game by Lindsay Buroker
Rated: 4.44 of 5 stars · 27 ratingsAlisa Marchenko has reunited with her daughter, and even though she hasn’t figured out how to get Jelena to accept Leonidas yet, she dreams of the three of them starting a new life together. They can return the Star Nomad to its original purpose of running freight and staying out of trouble (mostly)... -
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![Rebel by Jenny Schwartz]()
Rebel by Jenny Schwartz
Rated: 4.42 of 5 stars · 12 ratingsLife is complicated along the Hadrian Line. Decisions made on the border will decide the fate of the entire Human Sector.Nora is adjusting to her new role as a player in the games of the powerful. She's gained some interesting enemies and some even more dubious allies. She has also been presented with a unique opportunity, courtesy of Jonah... -
![Going Ballistic by Dorothy Grant]()
Going Ballistic by Dorothy Grant
Rated: 4.67 of 5 stars · 6 ratingsWhen 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...Categorized as:
military aliens romance sci-fi fiction post-apocalyptic action-adventure genetic-engineering -
![Perilous Hunt by Lindsay Buroker]()
Perilous Hunt by Lindsay Buroker
Rated: 4.35 of 5 stars · 28 ratingsAfter failing to catch up with her daughter Jelena so many times, Alisa's optimism is battered, but her determination has never waned. She, Leonidas, and their eclectic crew are hunting down a Starseer research station in the heart of the Kir Asteroid belt—Jelena's supposed location. Alisa vows that she will find her daughter if she has to search a million asteroids to do so... -
![Rogue Cyborg by Grace Goodwin]()
Rogue Cyborg by Grace Goodwin
Rated: 4.40 of 5 stars · 10 ratingsHe conquers her, body and soul. Makarios of Kronos is a rebel, a smuggler who reports to no one, not even those on Rogue 5. But one betrayal sends him to a Coalition brig, and to a fate worse than death—capture by the Hive. He escapes but exchanges one prison for another. He now lives on the Colony, contaminated and deemed a risk... -
![Sublime Target by Anna Carven]()
Sublime Target by Anna Carven
Rated: 4.40 of 5 stars · 10 ratingsJerik Garul wants a mate.As a former High Commander in the Kordolian Imperial Military, he's used to getting his way. Blunt-spoken and gruff, he has a tendency to shoot first and ask questions later.He doesn't know anything about humans and their mating customs. And he's mystified at how several of his battle-brothers—hard, ruthless, and lethal—have succeeded in securing their own females... -
![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... -
![Taking Vengeance by Cynthia Sax]()
Taking Vengeance by Cynthia Sax
Rated: 4.38 of 5 stars · 8 ratingsThe only force stronger than their hate is their love. Vengeance hates all humans. They killed every being he ever cared about. When the huge C Model cyborg is told he’s genetically compatible with the enemy, he makes it his mission to capture the female and use her to expel all humans from his home planet. That should be disappointingly easy. She’s a weak, fragile human... -
![Dark Ambitions by Michelle Diener]()
Dark Ambitions by Michelle Diener
Rated: 4.38 of 5 stars · 8 ratingsIt'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... -
![Inversion Point by Jenn Burke, Kelly Jensen]()
Inversion Point by Jenn Burke, Kelly Jensen
Rated: 4.38 of 5 stars · 8 ratingsZander and Felix's relationship has been to the brink and back: the Human-Stin War, imprisonment and an actual death/resurrection. Zander's death, to be specific, and the experience has left him…changed. The mysterious race known as the Guardians chose to revive him and appointed him as their emissary... -
![Wings and Teeth by Naomi Lucas]()
Wings and Teeth by Naomi Lucas
Rated: 4.38 of 5 stars · 8 ratingsOnce a wartime hero, Keir was famous for a cyborg, his face plastered on military banners on every side of the galaxy.But he wasn’t a hero, not really.He was a hunter, Nightheart’s free agent for the most classified missions. No one knew Keir worked for the EPED. He was beholden to no one. Stalking the most dangerous monsters across the universe... -
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![Relic of Sorrows by Lindsay Buroker]()
Relic of Sorrows by Lindsay Buroker
Rated: 4.28 of 5 stars · 28 ratingsCaptain Alisa Marchenko finally has a lead on finding her daughter, but her passengers want her to take them on their quest instead. Even though the Star Nomad is her ship, they have power she cannot fight, and she finds herself with no choice but to accept another detour. But the ancient relic they seek has the ability to destroy worlds and is coveted by many... -
![Doctor Galaxy by Jenny Schwartz]()
Doctor Galaxy by Jenny Schwartz
Rated: 4.30 of 5 stars · 10 ratingsNew ER doctor Alexi Sur always intended to join an aid agency. She'd just expected to work among humans. But when the Pax Galactica Corps becomes her only option (don't ask - the debts aren't hers, but the family is. Much to her regret), Alexi finds herself traveling the galaxy and learning alien physiology and culture, all while becoming a reality TV star... -
![Arkadian Skies by Lindsay Buroker]()
Arkadian Skies by Lindsay Buroker
Rated: 4.28 of 5 stars · 27 ratingsWith the man who kidnapped her daughter imprisoned aboard her ship, Captain Alisa Marchenko is closer than ever to reuniting her family. But her new guest has been in a coma for weeks, with the secret to her daughter's location locked away in his mind. She must find a way to sneak him into a state-of-the-art hospital on Arkadius, a planet in the heart of Alliance territory... -
![Brilliant Starlight by Anna Carven]()
Brilliant Starlight by Anna Carven
Rated: 4.28 of 5 stars · 25 ratingsAbbey We're back on Silence, orbiting the Dark Planet while my husband handles unfinished business on Kythia. For some reason, he seems a little bit tense. According to Tarak, Kythian politics can be complicated, especially when the entire Kordolian Empire has just been destroyed. I hope things don't get too complicated, because I don't want to be stuck here for too long... -
![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... -
![Krac's Firebrand by S.E. Smith]()
Krac's Firebrand by S.E. Smith
Rated: 4.28 of 5 stars · 23 ratingsSection K Replication Alluthan Clone, or Krac as he was now called, had one focus in his life; protecting the descendants of the Freedom Five who ruled Earth’s council. Rescued by members of the family from a secret facility, he pledged to do what he could to always keep them safe. Things become personal when insurgents target a special member of the Freedom Five, Gracie Jones-Jefe and her family... -
![Alien AI's Marine by Mina Carter]()
Alien AI's Marine by Mina Carter
Rated: 4.48 of 5 stars · 11 ratingsHe's the lone human male in a sea of lethal alien warriors. He's either gifted or suicidal...Kidnapped by aliens, rescued, and now on a secret base in a system he can't even pronounce, Major Jay Stephens has given up on a wing and a prayer... he's now on kicking butt and taking names. Especially when it comes to the alien AI who's risked everything, even her 'life' to protect him.The only problem... -
![First Awakenings by S.E. Smith]()
First Awakenings by S.E. Smith
Rated: 4.33 of 5 stars · 6 ratingsInternationally acclaimed, New York Times and USA TODAY bestselling author of Science Fiction, Urban Fantasy, and Paranormal Romance, S.E... -
![Ancient Thought by Viola Grace]()
Ancient Thought by Viola Grace
Rated: 4.33 of 5 stars · 6 ratingsIs the end of one life the start of the next? It is if you have been reset.Elizabeth has spent her life exploring the world, visiting strangers, and learning all the customs she could. When the first Volunteer Project began, she had been in her fifties and out of the running. Now, at eighty-two, they offer to tune her up and send her to the stars... -
![Break the Mold by Viola Grace]()
Break the Mold by Viola Grace
Rated: 4.33 of 5 stars · 6 ratingsProgramming nanites isn’t a hobby; it is in her blood. Time to break the mold and see what she can do. Lucky was holding the bomb that blew the staff of Adaptation Base to pieces. Instead of suffering from the blast, the acid in the device consumed her soft tissues... -
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![Twisting Sanity by Viola Grace]()
Twisting Sanity by Viola Grace
Rated: 4.33 of 5 stars · 6 ratingsWhen her body isn’t hers to command, Windy has to find ways to defend herself. Windy broke her spine in the attack, and she was taken from Adaptation Station and sold to the Splice. Her destiny was to act as their communication conduit. She hated the idea of destiny. When Alphy sent a hunter to come get her, he is shocked by her condition... -
![Cyborg Boss by Cara Bristol]()
Cyborg Boss by Cara Bristol
Rated: 4.33 of 5 stars · 6 ratingsHis cyborg intuition says hire the liar…Ex-Cyber Operations field agent Dale Homme has kissed danger and betrayal more times than he cares to count and has developed a sixth sense for smelling trouble. Now he runs a clandestine factory beneath the surface of the moon Deceptio, where confidentiality and security matter more than anything... -
![Taken by Terror by Lolita Lopez]()
Taken by Terror by Lolita Lopez
Rated: 4.33 of 5 stars · 6 ratingsTerror has never wanted a mate. He’s too damaged, too dark, to ever deserve a wife and family. At least, that’s what he tells himself until Maisie enters his life.Born deaf in a world that reviles the imperfect, Maisie has resigned herself to a life of loneliness. Until the day she’s thrust into Terror’s prison cell with orders to keep him alive, that is... -
![Pets in Space 6 by S.E. Smith, Veronica Scott]()
Pets in Space 6 by S.E. Smith, Veronica Scott
Rated: 4.33 of 5 stars · 6 ratingsPets in Space® is back for a new year of adventures! Join the incredible authors in this year's Pets in Space 6 for another out-of-this-world adventure. This award-winning, USA TODAY Bestselling anthology is packed full of your favorite Pets in Space®... -
![Into the Light by Anna Carven]()
Into the Light by Anna Carven
Rated: 4.21 of 5 stars · 27 ratingsAbbey When your mate is a Kordolian General who's betrayed the most vicious Empire in the Universe, things tend to get a little heavy from time to time. For the last six months, Tarak's had to divide his time between Earth and space, dealing with various... problems. But he's home now, and he tells me he's not going anywhere... -
![Kept By The Zandian by Renee Rose, Rebel West]()
Kept By The Zandian by Renee Rose, Rebel West
Rated: 4.25 of 5 stars · 8 ratingsHUMAN FEMALES CANNOT BE TRUSTED.She killed to escape her former slave master.Stowed away on my ship. Injected me with poison.Now she’s been remanded to me for probation.It’s my job to watch her. Rule over her. Discipline her.It’s up to me to decide if she’s worthy of asylum on our planet.And I’m dragging my feet on the decision.Because stars know, I like her right where I have her.In my home... -
![Dark Strength by Cynthia Sax]()
Dark Strength by Cynthia Sax
Rated: 4.25 of 5 stars · 8 ratingsThe 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... -
![Alien General's Beloved by Vi Voxley]()
Alien General's Beloved by Vi Voxley
Rated: 4.25 of 5 stars · 8 ratingsOnly one general can stand between an ancient nightmare and the safety of his people... This is a 100 k full scifi romance novel featuring a BBW human heroine and a growly alpha male Brion warrior general. It can and should be read as a standalone and has a guaranteed HEA ending! Grab it now for 99 Cents for a limited time! Lana Cormac is a woman with a mission... -
![Warlord's Baby by Nancey Cummings]()
Warlord's Baby by Nancey Cummings
Rated: 4.25 of 5 stars · 8 ratingsWhat to expect when you’re expecting an alien’s baby... Mercy has been pregnant for-freaking-ever. She’s tired and grumpy and ready to get this kid out of her. Of course, being adored by her alien warlord husband is awesome but she hasn’t seen her feet in a month. And she can’t get over this sneaking suspicion that there’s something Paax isn’t telling her.. -
![Tate's Torment by Hannah Walker]()
Tate's Torment by Hannah Walker
Rated: 4.25 of 5 stars · 8 ratingsWhen a rare day out goes disastrously wrong, the men have to fight for the survival of one of their own. Their actions spark an appearance by the Conclave, leaving the Avanti's future in the hands of those who choose to destroy them. Tate will give up everything to save his friends, even if it means losing Dariux and a love he never imagined he would find... -
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![Earth Files: Book 1 by Anna Carven]()
Earth Files: Book 1 by Anna Carven
Rated: 4.20 of 5 stars · 10 ratingsAs much as Rykal thought she was sheer perfection in that outfit, he wanted to flick out a claw and gently slice the garment from top to bottom so he could pay homage to her naked form. Later. She wouldn’t escape his tender clutches. But he would behave himself for now, because this particular outing was apparently an important event in Human culture. He was about to meet the mother of his mate... -
![Warriors' Claim by Michele Mills]()
Warriors' Claim by Michele Mills
Rated: 4.20 of 5 stars · 10 ratingsThree Xylan Warriors. One female Cyborg… Wyric, Zaxon and Bex. Trish can’t stop staring at the three handsome warriors who’ve recently moved in next door. She’s supposed to be helping them upgrade their facility, but Trish can’t keep her eyes off of their perfect physiques. Loving the sound of their harsh voices and their fierce demands. Wanting them. All three of them... -
![Dark Planet Warriors: Escape by Anna Carven]()
Dark Planet Warriors: Escape by Anna Carven
Rated: 4.17 of 5 stars · 12 ratingsAbbey Ever since we left the Fleet Station, Tarak has been his usual cryptic self. For some reason, he’s keeping everything very low-key, to the extent that we’re trying to sneak in to Kythia. Something’s up, and he’s not telling me anything. Every time I try to get answers, he distracts me with his stupid sexiness. Stupid sexy, silver, stubborn, insistent alien... -
![The Outlaw Cyborg by Honey Phillips]()
The Outlaw Cyborg by Honey Phillips
Rated: 4.44 of 5 stars · 11 ratingsCan a cyborg ranger save Mars - and the woman who won’t admit she needs him?Everything Serena Gatling ever wanted was taken away from her by a single horrific act of betrayal. Determined never to fall victim again, she closes her heart and dedicates her life to a cold-blooded quest to regain the one thing that still matters to her... -
![Starseers by Lindsay Buroker]()
Starseers by Lindsay Buroker
Rated: 4.19 of 5 stars · 27 ratingsThe mysterious and powerful Starseers have Captain Alisa Marchenko's daughter, and she will do whatever she must to get her back, even if it means traveling to their stronghold and confronting them personally. Unfortunately, her strongest ally, the cyborg Leonidas, may become a liability since the cyborgs and the Starseers have a long history of hating each other... -
![A Few Cyborgs More by Honey Phillips]()
A Few Cyborgs More by Honey Phillips
Rated: 4.34 of 5 stars · 13 ratingsA gruff older warrior. A hopeful young cyborg. A frightened woman on the run.J-817 would never forgive himself for the terrible mistake he had made -- a mistake which resulted not only in his conversion to a cyborg but caused the same fate for his young private... -
![Agent of Change by Sharon Lee, Steve Miller]()
Agent of Change by Sharon Lee, Steve Miller
Rated: 4.16 of 5 stars · 29 ratingsTwo tough-but-tender characters with a bright future--if they live that long. Terran Miri Robertson was a mercenary, but she retired to a cushy job as a private bodyguard. What she didn't know what that her client had powerful enemies. Now he's dead, and they're after her... -
![A Fistful of Cyborg by Honey Phillips]()
A Fistful of Cyborg by Honey Phillips
Rated: 4.35 of 5 stars · 12 ratingsA cynical cyborg. A woman with too many secrets. A shared past that could tear them apart -- or bring them together.S-756 despises all humans, but he hates the scientists who tortured him and turned him into a cyborg most of all. The long years terraforming Mars have only cemented that hatred... -
![The Magnificent Cyborg by Honey Phillips]()
The Magnificent Cyborg by Honey Phillips
Rated: 4.37 of 5 stars · 11 ratingsA woman with a troubled past. A cyborg with missing memories.W-246 is one of the last cyborgs sent to Mars to work on the terraforming project. While he doesn't remember how he became a cyborg, he has accepted his new role as a territorial judge. Until he encounters Cherry. He knows he could never forget a woman like her -- so why does she seem so familiar?Madam Cherry is through with men... -
![Claimed by Cipher by Lolita Lopez]()
Claimed by Cipher by Lolita Lopez
Rated: 4.50 of 5 stars · 8 ratingsAfter spending all of her life working in the mines, Brook jumps at the chance to earn a one-way ticket to the colonies. All she has to do is provide some maps and plant some explosives to help the sky warriors rescue one of their operatives.Easy enough, right?But what should have been a simple mission spirals into a fight for her life when she discovers a stolen stash of nerve gas in the mine...Categorized as:
aliens military space-opera action-adventure adult book contemporary enemies-to-lovers -
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![Ghost of a Machine by Cynthia Sax]()
Ghost of a Machine by Cynthia Sax
Rated: 4.32 of 5 stars · 12 ratingsFragile. Stubborn. His. Ghost, a C Model cyborg, has disconnected his machine from his human side. Severely damaged, he knows two things—the curvy human female on his ship belongs to him and he must keep her safe. He’ll stop at nothing to protect her, claim her, make her his. Primitive. Damaged. Hers. Lethe has seen the savage side of beings... -
![Raven's Children by Sabrina Chase]()
Raven's Children by Sabrina Chase
Rated: 4.17 of 5 stars · 6 ratingsMoire Cameron, former NASA explorer and web pilot, now has a working ship, a loyal crew, an unexpected son, and a valuable Earthlike planet to protect from the clutches of Toren. Then Ennis, the only one to discover her secret, is captured by Toren--and Moire discovers crucial information that could help end the crab-human war... -
![Aydarr by Veronica Scott]()
Aydarr by Veronica Scott
Rated: 4.17 of 5 stars · 6 ratingsJill Garrison, a maintenance tech at the Sectors Amarcae 7 colony, goes to sleep one night as usual only to wake up in her nightgown stranded in the middle of a forest on an unknown world. There’s no time to think as she’s stalked by carnivorous predators and rescued by genetically engineered warriors calling themselves the Badari... -
![Altered Design by Viola Grace]()
Altered Design by Viola Grace
Rated: 4.17 of 5 stars · 6 ratingsAlphy needs a guide, a pilot, and a companion. Who knew that Lexo could fit all requirements? Alone on a station with only the voices in her head, Alphy needs to get in touch with the humans who are left out in space, and that means moving her ship. The trouble that she has is that the station was never designed to be flown by someone who didn’t even have a driving license... -
![Doc's Orders by Cynthia Sax]()
Doc's Orders by Cynthia Sax
Rated: 4.17 of 5 stars · 6 ratingsShe wants both sides of her cyborg—the medic AND the beast. *** A fully functional cyborg is balanced. His machine half and his organic half work together to produce the perfect warrior. Doc isn’t fully functional. The G Model operates at the two extremes. When his machine is in complete control, he’s the logic-driven medic, saving lifespans... -
![Shalia's Diary: Book 4 by Tracy St. John]()
Shalia's Diary: Book 4 by Tracy St. John
Rated: 4.17 of 5 stars · 6 ratingsThis is a compilation from the free serial story blog ‘Shalia’s Diary – A Clans of Kalquor Story’ by Tracy St. John. It is highly recommended you read Shalia’s Diary, Books 1, 2, and 3 before reading this story. Shalia’s Diary Book 4 picks up immediately where Book 3 left off. Shalia feels ready for a little fun when the Kalquorian transport docks for shore leave at the Xniktix Space Station...
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