Books like 'Antigen'
Readers who enjoyed Antigen by R.A. Steffan also liked the following books featuring the same tropes, story themes, relationship dynamics and character types.
futuristic science fiction aliens m-f cold hero bodyguard-hero
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Revolution by Shelly Crane
Rated: 4.40 of 5 stars · 20 ratingsIn the fourth and final installment, everything is on the line. Merrick's life is in the balance and Lily is their only hope. Ellie and her new powers are miraculous, but also problematic; if she's with the bunker family, they won't be able to sense when the Lighters are there... -
![Relic of Sorrows by Lindsay Buroker]()
Relic of Sorrows by Lindsay Buroker
Captain 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...Categorized as:
aliens m-f cold hero bodyguard-hero military science fiction futuristic mature couple -
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![Krac's Firebrand by S.E. Smith]()
Krac's Firebrand by S.E. Smith
Section 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... -
![The Arcav Prince's Captive by Hope Hart]()
The Arcav Prince's Captive by Hope Hart
Can you ever truly escape the past? Everly, tough, fierce ex-federal agent has broken with her past, moving to Arcavia and training as the Queen's guard. Along with the challenges of adjusting to a new planet, she's dealing with a disasterous complication: The fallout from an incredible, stolen night with Korva, a broken male known as a traitor amonst both Arcav and humans...Categorized as:
aliens m-f science fiction futuristic non-human-hero explicit-plentiful length-short -
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![Brilliant Starlight by Anna Carven]()
Brilliant Starlight by Anna Carven
Rated: 4.36 of 5 stars · 17 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... -
![Guardian by Anna Hackett]()
Guardian by Anna Hackett
Rated: 4.40 of 5 stars · 15 ratingsRescued from alien slavers, former cop Dayna wakes to discover she’s host to a powerful alien symbiont, and the only man who can help her is the mysterious and dangerous casino owner, Rillian... -
![Emperor by Anna Hackett]()
Emperor by Anna Hackett
When an experimental starship test goes horribly wrong, a scientist from Earth finds herself fighting for her survival, and her only lifeline is a wild, powerful alien king.Waking on an alien world, wracked by pain, Dr. Poppy Ellison is confused and adrift…until his voice calls to her in the darkness...Categorized as:
aliens cold hero m-f science fiction futuristic sweet heroine explicit-open-door length-medium -
![Hatched by Erin Tate, Celia Kyle]()
Hatched by Erin Tate, Celia Kyle
Rated: 4.29 of 5 stars · 21 ratingsTaulan joi Lana Coburn, War Master of the Preor third fleet, is finally having his wishes granted. He has a mate and will soon have two dragonlets to protect and love. But only if he can live to see them born. Or, as his Lana says, hatched . This short story is set in the DRAGONS OF PREOR world and does not stand alone... -
![Dark Strength by Cynthia Sax, Amanda Kelsey]()
Dark Strength by Cynthia Sax, Amanda Kelsey
Rated: 4.56 of 5 stars · 9 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... -
![The Arcav Commander's Human by Hope Hart]()
The Arcav Commander's Human by Hope Hart
A lifetime of duty to his people… …Or the woman who could be his? Jaret has been completely dedicated to the Arcav race for centuries. His only focus is the continuation of his species. Known for being cold and remote, no one is more surprised than Jaret when he insists on leading the mission to rescue the humans kidnapped for slavery...Categorized as:
aliens m-f futuristic science fiction non-human-hero explicit-plentiful length-short -
![The Arcav Guard's Female by Hope Hart]()
The Arcav Guard's Female by Hope Hart
Rated: 4.31 of 5 stars · 16 ratingsShe’s on a quest for revenge… ...But he’s on a mission to make her his... After being abducted by aliens and rescued by the Arcav, all Peyton wants is revenge. Well, that, and a trip straight back home to Earth where she belongs. She’s not interested in the handsome Arcav Guard who stares at her so intently. Even if he does make her wish she’d met him before her captivity... -
![Home World by Erin Raegan]()
Home World by Erin Raegan
Rated: 4.22 of 5 stars · 21 ratingsPeyton I fell in love with an alien. Our world was invaded by carnivorous freaks and the Dahk swooped in and saved me and my friends. They want to save the Earth but we are our own worst enemy, or so I thought. The truth is we have no idea what's out there. Now I'm on my way to Home World. The Dahk's world. An alien world. I had no choice, it was taken from me... -
![Holmes by Anna Hackett]()
Holmes by Anna Hackett
Rated: 4.36 of 5 stars · 14 ratingsThe battle of survival against the invading aliens heats up…but Hell Squad never quits. General Adam Holmes’ life is dedicated to keeping his small band of survivors alive. On the run, with only Hell Squad and the other soldiers for protection, they are making their last dangerous drive to the secret stronghold of the Enclave... -
![Tyro by Tasha Black]()
Tyro by Tasha Black
Rated: 4.31 of 5 stars · 13 ratingsPhoebe has nothing but her secrets. Her alien protector is determined to lay them bare.Phoebe arrives on the moon of Clotho with a trunk full of secrets and an imagination filled with preconceived notions about life on the frontier. She’s more than ready to scrap and fight for her own piece of farmland, and a future for the little one she is adopting...Categorized as:
aliens bodyguard-hero shapeshifters non-human-hero science fiction futuristic length-short -
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![A Very Arcav Christmas by Hope Hart]()
A Very Arcav Christmas by Hope Hart
Rated: 4.39 of 5 stars · 10 ratingsBabies, 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... -
![Help Wanted: Wife by Cara Bristol]()
Help Wanted: Wife by Cara Bristol
They have nothing to lose except their hearts. The only thing keeping widower Larth from succumbing to grief is running the fledgling bakery founded by his late wife. He intends to make the business the biggest, best bakery in all of Caradonia. But he can’t do it alone. Unable to find affordable help, he turns to Cosmic Mates and advertises for a wife in-name-only... -
![A Darkside Interlude (Darkstar Mercenaries .5) by Anna Carven]()
A Darkside Interlude (Darkstar Mercenaries .5) by Anna Carven
Rated: 4.26 of 5 stars · 14 ratingsCommander Iskar Gar-Kurai isn't impressed by humans or their backwater planet. If he had his way, he'd be working closer to home, on a planet where it wasn't so infernally hot ... But orders are orders, especially when they come from the very top. If he's going to be on Earth for the long term, Iskar needs to learn more about its strange inhabitants... -
![Tempt Me Eternally by Gena Showalter]()
Tempt Me Eternally by Gena Showalter
Rated: 4.16 of 5 stars · 19 ratingsNew York Times bestselling author Gena Showalter's Tempt Me Eternally is now available from S&S Audio for the first time! Gena Showalter puts a daring spin on a tale of huntress and hunted…and concocts a sensual chemistry that is positively explosive. Aleaha Love can be anyone—literally. With only skin-to-skin contact, she can change her appearance and assume any identity... -
![Roth by Anna Hackett]()
Roth by Anna Hackett
Rated: 4.21 of 5 stars · 15 ratingsIn the aftermath of a deadly alien invasion, a band of survivors fights on… Roth Masters is a protector to the bone. Driven by the losses of his past, he fights side-by-side with Hell Squad to protect the human survivors of the alien invasion. As leader of Squad Nine, he and his team are known for their perfect timing in a firefight... -
![Manu by Anna Hackett]()
Manu by Anna Hackett
Rated: 4.28 of 5 stars · 11 ratingsAs 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... -
![Redemption by Sandra R. Neeley]()
Redemption by Sandra R. Neeley
Rated: 4.26 of 5 stars · 12 ratingsCast aside and forced to live apart from his family as a child, Rokai ahl has become insolent, resentful, angry, borderline criminal, and a general outcast as an adult. He has managed to build a life for himself in which he answers to no one and nothing. His loyalty lies with only himself... -
![The Arcav King's Obsession by Hope Hart]()
The Arcav King's Obsession by Hope Hart
He Stole Her Life... ...Can he Win Her Heart? Just a few weeks ago, Harlow was living her life on Earth- locking up bad guys and drinking beers with her fellow cops after shift. She never wanted to be the Arcav King's mate. Unfortunately, she was outplayed. Now, Harlow must learn how to rule over an alien species, while making room for her mate's giant... ego...Categorized as:
aliens m-f futuristic science fiction non-human-hero explicit-plentiful length-short -
![Niko: Scifi Alien Invasion Romance by Anna Hackett]()
Niko: Scifi Alien Invasion Romance by Anna Hackett
Rated: 4.23 of 5 stars · 13 ratingsIn the aftermath of a deadly alien invasion, a band of survivors fights on… Mackenna Carides is tough, strong, and excellent at her job as second-in-command of Squad Nine. She often works side by side with Hell Squad on some of the toughest missions to fight back against the alien raptors. Now she’s helping the survivors of Blue Mountain Base settle into their new home at the Enclave... -
![Taming Jax by Mikayla Lane]()
Taming Jax by Mikayla Lane
Rated: 4.33 of 5 stars · 9 ratingsJaxson Adronatof had vowed as a child that she would spend her life hunting the evil that had slaughtered her parents and help those like her, who were different. For 15 years, she’d been the leader of a resistance force and one stubborn, arrogant and frustratingly gorgeous alien claiming she’s his mate isn’t going to deter her from that vow... -
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![Hemi by Anna Hackett]()
Hemi by Anna Hackett
Rated: 4.30 of 5 stars · 10 ratingsIn the middle of an alien invasion, a big, tough, tattooed former mercenary is finally going to chase down his woman. Camryn McNab knows love is a lie. Okay, maybe not for everybody--her fellow soldiers on Squad Nine have managed to fall in love in the middle of a vicious alien attack. But it's not for her. She comes from two people incapable of love... -
![Hunter: Desert Hunter / Alien Hunter / Glactic Gladiator Christmas by Anna Hackett]()
Hunter: Desert Hunter / Alien Hunter / Glactic Gladiator Christmas by Anna Hackett
Rated: 4.30 of 5 stars · 10 ratingsstrong>From the dangerous desert sands to the deadly glitz of the city, the lawless desert planet of Carthago is filled with lethal hunters risking it all for the women who capture their hearts. HUNTER contains two novellas and one short story all set in the Galactic Gladiators series... -
![Alien Retribution by Sadie Carter]()
Alien Retribution by Sadie Carter
Rated: 4.38 of 5 stars · 8 ratingsSince the day his family was murdered, Boris has been obsessed with vengeance. The last thing he needs in his life is a mate. Besides, what sort of female would want a scarred, crippled male who has taken a vow of silence? Nope, there is no room in his life for a female. Then he meets Nassir. Beautiful. Fragile. Distant... -
![Shifter Planet: The Return by D.B. Reynolds]()
Shifter Planet: The Return by D.B. Reynolds
Rated: 4.43 of 5 stars · 7 ratingsRachel Fortier is a much sought-after expert when it comes to exotic planets—especially the deadly kind. So when she’s hired by Earth Fleet’s most respected scientist to join a mission to the tightly closed planet Harp, it’s a dream come true. Until she discovers their mission is to capture shifters and sell them to theMilitary... -
![Torrvok by Alana Khan]()
Torrvok by Alana Khan
Rated: 4.60 of 5 stars · 5 ratingsTorrvok, a cunning and skilled warrior, protects Sierra from enemies who hunt them without mercy. But can he keep her safe from the raging beast writhing under his skin?SierraHe rescued me—twice—then protected me on a dangerous chase across a continent.Despite his warnings not to trust him, when we’re together I’m only aware of the pounding desire his presence ignites... -
![Rogue by Anna Hackett]()
Rogue by Anna Hackett
Rated: 4.19 of 5 stars · 15 ratingsAbducted by alien slavers and taken to a lawless desert world, the last thing she expects is to be claimed by a handsome alien rogue. Rogue contains two action-packed novellas in the Galactic Gladiators series. Information Rogue: arrogant information merchant Zhim doesn’t know what hits him when he collides with feisty human hacker Ryan... -
![Guard: Dark Guard / Cyborg Guard by Anna Hackett]()
Guard: Dark Guard / Cyborg Guard by Anna Hackett
Rated: 4.20 of 5 stars · 13 ratingsFrom the dangerous desert sands to the deadly glitz of the city, the lawless desert planet of Carthago is filled with lethal cyborg gladiators risking it all for the women who capture their hearts. GUARD contains two novellas and one short story all set in the Galactic Gladiators: House of Rone series... -
![The Arcav General's Woman by Hope Hart]()
The Arcav General's Woman by Hope Hart
How do you choose between honor and love? Harmless, fun Methi, can always be counted on to get into trouble. But the cocky Arcav with a heart of gold is slowly being replaced with a cold, bitter male who fights his demons at every turn. Some Arcav can wait for their mates for centuries before risking insanity. But others can’t. Methi knows who is mate is...Categorized as:
aliens m-f science fiction futuristic non-human-hero explicit-plentiful length-short -
![Fighting for the Alien Bride Lottery by Margo Bond Collins]()
Fighting for the Alien Bride Lottery by Margo Bond Collins
Rated: 4.22 of 5 stars · 9 ratingsI thought the Bride Games were my way out. But now I'm afraid they may simply be another cage.With new rules in place, The Alien Bride Lottery is drawn from willing participants only. But the Khanavai are beginning to figure out that means only the most desperate human women enter.Including me.I'll do anything to get away from my overbearing Mafia family and their Machiavellian plans for me... -
![Kol: Alien Abduction Romance by Vi Voxley]()
Kol: Alien Abduction Romance by Vi Voxley
Rated: 4.25 of 5 stars · 8 ratingsForever is no time at all, sometimes. Jackie Hooper is all out of time. An incurable illness at her side, she's trying to make the best of the opportunities she has left. Getting abducted by a Nayanor warlord was not on that list of things to do. But then again, spending your last moments with the hottest man in the universe can't be all bad.. -
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![Ash by Anna Hackett]()
Ash by Anna Hackett
Rated: 4.22 of 5 stars · 9 ratingsIn the middle of an alien invasion, will the bad boy berserker catch the geeky tech genius? Computer genius Marin Mitchell is doing her part to help humanity survive the raptor invasion, working tirelessly to decrypt alien data. She spends her days working and drooling over a certain tattooed, biker berserker from Squad Three. But Marin knows the rules: geeks do not snag sexy bad boys... -
![Venomous Heart by Mary Auclair]()
Venomous Heart by Mary Auclair
Rated: 4.29 of 5 stars · 7 ratingsAfter drowning his soul in blood, can this alien warrior be saved? As the only doctor on Aveyn, Ava works day and night for the people she considers hers. Only… she’s not really one of them, is she? She’s a hybrid, a highly illegal creature created by Trade Minister Knut for his personal enjoyment... -
![Crossing Quinn by Gail Koger]()
Crossing Quinn by Gail Koger
Rated: 4.33 of 5 stars · 6 ratingsQuinn Jones is a formidable Coletti warlord. His mission is to capture Xenia and bring her back to Tanith to be mated with a warrior the Overlord has chosen. Problem is, Quinn finds himself falling for the beautiful Farin. Her unusual “psychic powers, combat training and berserker abilities” make her the perfect mate for him... -
![Hothar's Folly by Gail Koger]()
Hothar's Folly by Gail Koger
Rated: 4.33 of 5 stars · 6 ratingsUndercover psychic investigator Casey Jones’ hunt for a traitor in Central Command gets blown all to hell when the crew of the military C130 cargo plane she's riding on tries to kill her. Drawing on her telekinesis, Casey stops their assassination attempt and bails out as the aircraft goes down in flames... -
![Reclaimed by Sandra R. Neeley]()
Reclaimed by Sandra R. Neeley
Rated: 4.33 of 5 stars · 6 ratingsBa Re’ is a General in the Cruestaci military. He has always been quietly stoic, considering it an honor to carry the mantle of duty and leadership, while overseeing all the engineering aspects of Command Warship 1. But don’t let his stoic nature fool you, he is as lethal as any warrior among his people... -
![Warlord Sky by Cynthia Sax]()
Warlord Sky by Cynthia Sax
Rated: 4.40 of 5 stars · 5 ratingsNo one grounds a barbarian warrior. Qulpa, a Chamele warrior, lost everyone he loved in the brutal Succession Wars. Flying is the only thing that brings him joy. Serving as his team’s pilot is the sole duty he has left. Then a horrific crash leaves him injured and unable to fly. The one being who can help him is also his gerel, the female destined to be his... -
![Rise of the Shadow Warriors by Michelle Howard]()
Rise of the Shadow Warriors by Michelle Howard
Rated: 4.14 of 5 stars · 11 ratingsShe came from a race long thought dead. Shaina C’Err belonged to the Olak’din, a secret race of warriors. With her people in danger she asked for help from the one warrior who owed her. With a Kabanian Warlord at her side, she might have a chance at defeating her enemies. He craved what his friends had attained. Argan Kril never thought he’d long for love until his life changed forever... -
![Theron by Anna Hackett]()
Theron by Anna Hackett
Squad mates, best friends, and fighting to survive in the middle of an alien invasion. Can she make one stubborn alpha male soldier see her as something else? Sienna Rossi has always been a mix of contradictions. She loves ice cream, likes cooking, and is skilled at taking down aliens with her squad. Sweet and tough, soldier and woman, most people can't seem to make sense of her..Categorized as:
aliens cold hero m-f military science fiction futuristic independent heroine height-difference -
![Dark Planet Warriors: Earth Files - Book 1 by Anna Carven]()
Dark Planet Warriors: Earth Files - Book 1 by Anna Carven
Rated: 4.08 of 5 stars · 12 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... -
![Lost in Barbarian Space by Anna Hackett]()
Lost in Barbarian Space by Anna Hackett
Rated: 4.11 of 5 stars · 9 ratingsA clash of cultures. Security agent versus barbarian warrior. On an expedition to a newly discovered barbarian world, an experienced security agent doesn’t expect to be working with a big, bossy barbarian warrior. Agent Honor Brandall enjoys her job as security agent for the Institute of Historical Preservation’s expedition ships. Adventures to distant planets – awesome... -
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![Unexpected Bride by Michelle Howard]()
Unexpected Bride by Michelle Howard
Rated: 4.11 of 5 stars · 9 ratingsSaran was a Warlord who was used to having what he wanted, when he wanted, and how he wanted. He was strong, capable and feared. Then an event changed his world forever. Now all he has left is fear and the woman that he gave little notice to before... -
![Rydak's Fall by Michelle Howard]()
Rydak's Fall by Michelle Howard
Rated: 4.11 of 5 stars · 9 ratingsMeet the man behind the Jutak warrior. Rydak knew he’d never have a Chosen. His empathic touch blessed and cursed him with the ability to read and sense the emotions of everyone he came in contact with. Until her. Lissi Alonson, sister to the Unit Leader of the Jutak warriors he respected and a woman he’d be a fool to fall for... -
![Minotaur's Curse by Susan Trombley]()
Minotaur's Curse by Susan Trombley
Lauren was haunted by nightmares of monsters as a child, but learned the hard way that the worst monsters look like everybody else. While visiting her mother and stepfather during the holidays, she’s sent to search for her two younger brothers, who have a tendency to wander onto the land of their nearest neighbor—land that has been abandoned for a reason...Categorized as:
aliens m-f science fiction futuristic competent heroine explicit-open-door length-short -
![Haldis Imperium by Viola Grace]()
Haldis Imperium by Viola Grace
Rated: 4.13 of 5 stars · 8 ratingsAmy Tyrell has worked for the most arrogant, obnoxious, and handsome guy she has ever seen for the last few years. His Imperial Highness Palden VII was attached to his Negotiator Tyrell, and considered him his best friend. The armor that was worn by the Negotiators both protected her and kept her from contact, until it came off... -
![Sky Raiders by Michelle Diener]()
Sky Raiders by Michelle Diener
Rated: 4.13 of 5 stars · 8 ratingsFirst they flew their mysterious sky craft through the skies of Barit. Then they started attacking. Finally, they began to raid. Garek's one year of duty as a guard walking the walls of Garamundo was extended to two when the sky raiders appeared. Two long years away from home and his lover, Taya. When he finally returns, the town is empty... -
![Darrok: Kaldar Warriors #2 by T.J. Yelden]()
Darrok: Kaldar Warriors #2 by T.J. Yelden
Rated: 4.13 of 5 stars · 8 ratingsAuthor’s Note: This is Book 2 in the Kaldar Warrior Series. While this book may be read as a standalone, the reader is advised to read the books in order to gain insight into the characters and extended storyline. Samantha always had a hard time letting people in...
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