Books like 'Rules of Engagement'

Readers who enjoyed Rules of Engagement by Kaitlyn O'Connor also liked the following books featuring the same tropes, story themes, relationship dynamics and character types.

futuristic  sc-fi  romance  space  action / adventure  steamy  aliens  cyborgs  alpha-mc  paranormal 

  • Taunting Krell by Laurann Dohner

    Taunting Krell by Laurann Dohner

    Rated: 4.28 of 5 stars
    · 18 ratings
    Book 7 in the Cyborg Seduction series. Krell hates humans. They left him scarred and undesirable to females. He’s lived a lonely existence in his home world because of their brutality. So he’s angry when he’s ordered to interrogate the captured human. She’s the enemy, a soldier from Earth. He’ll show her the same mercy they showed him. None...
  • Loving Zorn (Zorn Warriors, #1-2) by Laurann Dohner

    Loving Zorn (Zorn Warriors, #1-2) by Laurann Dohner

    Rated: 4.29 of 5 stars
    · 14 ratings
    Ral's WomanAriel never knew aliens existed until she finds herself kidnapped and taken from Earth. When the Anzon declare humans useless, she learns her fate-prize for the winner of a brutal fight between large, muscled alien men. Ral is a Zorn warrior. He has also been kidnapped by the Anzon, along with his crew. Forced into slavery, he's got one thing on his mind-freeing his people...
  • Enthralled by Tiffany Roberts

    Enthralled by Tiffany Roberts

    Rated: 4.36 of 5 stars
    · 24 ratings
    He conquered her, but he is the one enthralled.Ketahn hadn’t wanted a mate. Fate gave him Ivy Foster. Now, he wants nothing more than to enjoy his little human.But fate is not content to make things so simple.With an enraged queen searching for him, Ketahn knows the Tangle is not safe for his mate. They need to leave. Yet Ivy will not forsake her people, and he cannot condemn her compassion...
  • Shattered Silence by Anna Carven

    Shattered Silence by Anna Carven

    Rated: 4.27 of 5 stars
    · 15 ratings
    Enki Zakanin just wants peace and quiet. He's completed his mission, and on the journey back to the Kordolian Fleet Station, he'd prefer to be left alone so he can manage the literal demon inside his head. Alone. So when a strange distress call breaks the silence, his first instinct is to ignore the signal...
  • Redeeming Zorus by Laurann Dohner

    Redeeming Zorus by Laurann Dohner

    Rated: 4.22 of 5 stars
    · 18 ratings
    *** THIS IS A RERELEASE OF A PREVIOUSLY PUBLISHED BOOK *** Charlie’s brother has put her in the no-win situation of having to rescue a cyborg from Earth Government. It’s dangerous, she’ll become an outlaw on Earth, but it’s the only way to save her brother’s life. The imprisoned cyborg is rude, conceited and probably the biggest jerk she’s ever had the misfortune to meet...
  • B Free by Cynthia Sax

    B Free by Cynthia Sax

    Rated: 4.50 of 5 stars
    · 6 ratings
    B is the last remaining B Model cyborg. All of his brethren, the beings he trained with, fought with, cared deeply for, have perished.Or so he believes.When he intercepts a communication mentioning the existence of one of his kind, he has to investigate the source. The message could be a trap set by his enemies...
  • The Torid Affair by Laurann Dohner

    The Torid Affair by Laurann Dohner

    Rated: 4.43 of 5 stars
    · 17 ratings
    When riots erupt on planet Torid, the crew of Defcon Red is tasked with quelling the violence and tending the injured. Even Alien Research Specialist Jessa Brick is pressed into service. Arguably more comfortable in her lab, the doctor is shocked at the obvious inequality on Torid...
  • Taking Vengeance by Cynthia Sax

    Taking Vengeance by Cynthia Sax

    Rated: 4.38 of 5 stars
    · 8 ratings
    The 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...
  • Return to Dark Earth by Anna Hackett

    Return to Dark Earth by Anna Hackett

    Rated: 4.38 of 5 stars
    · 8 ratings
    His career plan never included becoming one of the galaxy's most infamous treasure hunters. And it certainly never included his one weakness: Nera Darc.Astro-archeologist Niklas Phoenix loved his job studying and safeguarding artifacts at the Institute of Historical Preservation...until he learned that it was all a lie...
  • Peace Maker by Michelle Diener

    Peace Maker by Michelle Diener

    Rated: 4.38 of 5 stars
    · 8 ratings
    Fliss knows all about her ancestors, the Travelers, who were forced to land on Fjern thousands of years ago, but when it comes to the Gyr—the enhanced warriors who protect the people of Fjern from the monsters that inhabit the planet—she’s in the dark, even though she is one herself...
  • Touch of Eon by Anna Hackett

    Touch of Eon by Anna Hackett

    Rated: 4.33 of 5 stars
    · 23 ratings
    She’ll do anything to free her sister and save the Earth from invasion, even if she’s blackmailed into stealing sacred alien artifacts…and becomes the prey of the dark, deadly warrior sent to hunt her down.Special Forces Space Marine Lara Traynor wants to save her sister and her planet from annihilation by the deadly insectoid Kantos...
  • Saved by the Alien Warrior by Hope Hart

    Saved by the Alien Warrior by Hope Hart

    Rated: 4.35 of 5 stars
    · 21 ratings
    I was abducted, sold, then crash-landed on a strange planet... only to be abducted again.  And you know the funny thing? I barely even care.I’m numb. You see, I’ve already lost everything. When you’re doing something you love, you never think that it could be the last time. That someone might take your life from you and leave you stranded on a planet where most of the locals are out to get you...
  • Brilliant Starlight by Anna Carven

    Brilliant Starlight by Anna Carven

    Rated: 4.28 of 5 stars
    · 25 ratings
    Abbey 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...
  • Risteard’s Unwilling Empress by S.E. Smith

    Risteard’s Unwilling Empress by S.E. Smith

    Rated: 4.21 of 5 stars
    · 14 ratings
    Ristéard Roald is the powerful and deadly ruler of Elpidios, a planet that is slowly dying without the blood stones needed to absorb the radiation gradually destroying its stratosphere. He has sworn to do whatever it takes to protect his world and his people, but time is running out.Hope comes from an unexpected source, the Kassis...
  • Mission: Planet Biter by Laurann Dohner

    Mission: Planet Biter by Laurann Dohner

    Rated: 4.21 of 5 stars
    · 14 ratings
    When his Veslor grouping answers a distress call on planet Biter, Roth discovers a sole survivor. The little female isn't rational and latches onto him like a lifeline. That surprises Roth, since most humans fear him. This one won't let him go, but he must resist his desire for her. It's the only honorable thing to do...
  • Imperator by Anna Hackett

    Imperator by Anna Hackett

    Rated: 4.29 of 5 stars
    · 24 ratings
    Space station security specialist Sam has done one thing since her abduction by alien slavers… fight to survive. But now one strong alien gladiator stands at her side and Sam knows she is no longer alone. Thrust into a lawless desert arena, Sam Santos has done terrible things in order to stay alive. As the Champion of Zaabha, she’s been fighting to find a way out...
  • Star's Storm by S.E. Smith

    Star's Storm by S.E. Smith

    Rated: 4.19 of 5 stars
    · 16 ratings
    Star Strauss has always been a fighter. From the time she was born prematurely to her life on the road as a circus performer. She has never let her small stature keep her from achieving her dreams. She is one of the best aerial performers in the world. Her love of being up high and flying free has helped her overcome the challenges she faces when she is on the ground...
  • Tansy's Titan by S.E. Smith

    Tansy's Titan by S.E. Smith

    Rated: 4.19 of 5 stars
    · 16 ratings
    Tansy 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...
  • Draekon Warrior by Lee Savino, Lili Zander

    Draekon Warrior by Lee Savino, Lili Zander

    Rated: 4.29 of 5 stars
    · 23 ratings
    Captured in space. Imprisoned. Sold to the highest bidder. But my biggest problem is this bossy, aggravating, impossible, alien who’s supposed to rescue me. The bossy alien I kissed. That might have been a mistake.Kadir is dangerous. I’ve seen him fight, and his body is littered with scars. He’s a soldier. A warrior. And when he loses control, he turns into a big scary dragon and breathes fire...
  • Champion by Anna Hackett

    Champion by Anna Hackett

    Rated: 4.25 of 5 stars
    · 24 ratings
    Fighting for love, honor, and freedom on the galaxy’s lawless outer rim…Space marine Blaine Strong enjoyed being a composed, controlled member of space station security…until he was abducted by alien slavers. Forced into underground fight rings and pumped full of drugs, he’s now seething with anger and out for revenge...
  • Alien Paladin's Woman by Vi Voxley

    Alien Paladin's Woman by Vi Voxley

    Rated: 4.33 of 5 stars
    · 6 ratings
    Sometimes, what the galaxy needs is a hero no one's ever heard of. Tieran, the Commander of the Palian paladins, has never been allowed to have anything of his own, other than the blade in his hands and the honor he serves with. But a feisty, curvy, and utterly impossible human woman is about to change all that...
  • Victoria's Embrace by Stacy Jones

    Victoria's Embrace by Stacy Jones

    Rated: 4.33 of 5 stars
    · 6 ratings
    With explosive trackers embedded in their arms, a psychopath in control of the gladiator arena they’ve come to call home, and slavers closing in, time is running out for Victoria and her guys…They managed to escape a slaver transport, only to find themselves trapped outside the walls of the arena and on the run in a dangerous alien city...
  • Into the Light by Anna Carven

    Into the Light by Anna Carven

    Rated: 4.21 of 5 stars
    · 27 ratings
    Abbey 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...
  • Clan and Conviction by Tracy St. John

    Clan and Conviction by Tracy St. John

    Rated: 4.25 of 5 stars
    · 8 ratings
    The drug Delir is sweeping the Kalquorian Empire, leaving madness and death in its wake. Investigator Dramok Gelan has already lost his enforcer partner in a deadly shootout because of the case. With no clues or suspects, he despairs of putting an end to the epidemic. Then a familiar face enters the picture: new partner and former lover Nobek Wynhod...
  • Lost in Barbarian Space: A Phoenix Adventures Sci-fi Romance by Anna Hackett

    Lost in Barbarian Space: A Phoenix Adventures Sci-fi Romance by Anna Hackett

    Rated: 4.25 of 5 stars
    · 8 ratings
    A 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...
  • Hers To Command by Cynthia Sax

    Hers To Command by Cynthia Sax

    Rated: 4.20 of 5 stars
    · 10 ratings
    Three Battered Hearts. One Perfect Love Ace and Thrasher share a special bond. They’ve never acknowledged that connection and have never fully acted on it. The Humanoid Alliance kill cyborg males like them, deeming the warriors to be defective. Now that Ace and Thrasher have escaped, they don’t trust the cyborg council and their brethren to react any differently...
  • Chasing Mayhem by Cynthia Sax

    Chasing Mayhem by Cynthia Sax

    Rated: 4.20 of 5 stars
    · 10 ratings
    Wild. Free. Hers. Mayhem has spent his lengthy lifespan obeying the Humanoid Alliance’s rules. Finally free from their cruel control, the cyborg warrior plans to cause chaos. He infiltrates a remote settlement, provokes the savage locals until they want him dead, and allows himself to be captured by the sexiest little Retriever he has ever laid his mechanically-enhanced eyes on...
  • Vexing Voss by Gail Koger

    Vexing Voss by Gail Koger

    Rated: 4.17 of 5 stars
    · 12 ratings
    For Voss, a Coletti Warlord, conquering the universe is a piece of cake. After all, he's a master of psychic seduction; no one can resist him when he sets his mind to it.Zoey Jones is determined to find her mother's killer. Surrendering to a fierce Coletti warrior is the last thing on her mind...
  • Kyele's Passion by Michelle Howard

    Kyele's Passion by Michelle Howard

    Rated: 4.17 of 5 stars
    · 12 ratings
    Being a Jutak warrior is all Kyele Bastien cares about until one mission changes everything. The Earth female has carved a place in his heart without even trying and now he’ll do anything to make sure nothing ever hurts her again...
  • Dark Planet Warriors: Escape by Anna Carven

    Dark Planet Warriors: Escape by Anna Carven

    Rated: 4.17 of 5 stars
    · 12 ratings
    Abbey 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...
  • Infinity's Embrace by Anna Carven

    Infinity's Embrace by Anna Carven

    Rated: 4.13 of 5 stars
    · 15 ratings
    Rescued from captivity by a group of rather intimidating Kordolians, Noa finds herself recovering at a strange facility in the middle of the desert. SynCorp's medical experiments have left her with an impossible ability she can't control, and nobody really seems to know how to help her. She's fragile and shattered, a mere shadow of her former self, and she has nowhere else to go...
  • The Outlaw Cyborg by Honey Phillips

    The Outlaw Cyborg by Honey Phillips

    Rated: 4.44 of 5 stars
    · 11 ratings
    Can 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...
  • The Breeding Experiment by Laurann Dohner

    The Breeding Experiment by Laurann Dohner

    Rated: 4.18 of 5 stars
    · 24 ratings
    Darla Mitts has been secretly protecting her younger sister, Becky, for years. She’ll do anything to continue, even if it means leaving their family to work on a United Earth fleet ship. She thinks they’ll be safe. She’s quickly proven wrong when the sisters’ transport shuttle is seized by aliens instead...
  • Gracie's Touch by S.E. Smith

    Gracie's Touch by S.E. Smith

    Rated: 4.15 of 5 stars
    · 27 ratings
    Gracie Jones was little more than a child when the Earth was invaded by an alien species. Escaping into the subway tunnels of New York City, she hid in fear of being captured. Discovered by four men who became her protectors, she fought alongside them and they became known as the Freedom Five...
  • Ghost of a Machine by Cynthia Sax

    Ghost of a Machine by Cynthia Sax

    Rated: 4.32 of 5 stars
    · 12 ratings
    Fragile. 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...
  • Devoured by Evangeline Anderson

    Devoured by Evangeline Anderson

    Rated: 4.15 of 5 stars
    · 26 ratings
    Tess Hughes is on the run from her abusive ex-husband. The problem is, he’s a detective and there’s no place on Earth he can’t find her. Solution? Hide somewhere that’s not on Earth—the Kindred Mother Ship. That’s how she winds up posing as Pairing Puppet—one of the robotic mistresses that service the Unmated Males of the Kindred who need a little sexual stress release from time to time...
  • Out of Darkness by Anna Carven

    Out of Darkness by Anna Carven

    Rated: 4.13 of 5 stars
    · 28 ratings
    The Kordolians are loose on the asteroid mining station Fortuna Tau, and first-rank mechanic Jia Morgan has become caught up in the thick of things. Under the careful watch of these steely-eyed silver warriors, Jia and her team have been tasked with repairing the hull of the Kordolians’ Alpha-Class battle cruiser, Silence...
  • The Skypirate by Justine Davis

    The Skypirate by Justine Davis

    Rated: 4.17 of 5 stars
    · 6 ratings
    Dax, a skypirate hunted to the ends of the universe by the cruel interstellar Coalition, can't escape the allure of Captain Califa Claxton. A chance to destroy the Coalition awaits them, and in the white heat of their explosive union a new bond may be forged - souls joined by a magnificent love...
  • Aydarr by Veronica Scott

    Aydarr by Veronica Scott

    Rated: 4.17 of 5 stars
    · 6 ratings
    Jill 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...
  • 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 ratings
    This 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...
  • Command Performance by Linnea Sinclair

    Command Performance by Linnea Sinclair

    Rated: 4.17 of 5 stars
    · 6 ratings
    Evil aliens, an amorous cyborg and an unexpected trip to an alternate universe: just another day in the life of Captain Tasha Sebastian. And tomorrow's even better. .
  • Warrior's Mate by Emma Alisyn

    Warrior's Mate by Emma Alisyn

    Rated: 4.17 of 5 stars
    · 6 ratings
    3rd book in the Yadeshi Brides series.A Dark Alien Prince + his unquenchable desire x his insatiable thirst = a warrior willing to defy a galaxy to claim his mate.Born with a platinum spoon in her mouth, warrior bride-in-training Gayle throws it away in order to sneak aboard a Yadeshi military vessel to escape imprisonment by her family...
  • Alien Guardian's Baby by Luna Hunter

    Alien Guardian's Baby by Luna Hunter

    Rated: 4.13 of 5 stars
    · 8 ratings
    Can their interstellar romance prevent a galactic war? Where no human has gone before Isabella Parker is en route to Vortex Station in response to a mysterious message on her datapad...
  • Alien Mine by Sadie Carter

    Alien Mine by Sadie Carter

    Rated: 4.13 of 5 stars
    · 8 ratings
    She was his mate.He hadn’t touched her. Had barely spoken to her. But the moment Thor saw her he had known.She was his.But there was something in her eyes that warned him to go slow. That old demons still held her in their grasp.It would take time and patience to convince her that they were meant to be together.Unfortunately, he had neither on his side...
  • Alien Sacrifice by Sadie Carter

    Alien Sacrifice by Sadie Carter

    Rated: 4.13 of 5 stars
    · 8 ratings
    Sent to Zerconia as a spy, Annabel is certain she’ll discover some nefarious plot to lure human women to Zerconia. Instead, she encounters a race of honorable, protective, gorgeous Alpha aliens.Not that she's attracted to any of them. Nope, not at all. Particularly not arrogant, grouchy, stick-in-the-mud Macon.Macon has his future mapped out. He likes his life well-ordered...
  • Salvage Rights by Kelly Lucille

    Salvage Rights by Kelly Lucille

    Rated: 4.13 of 5 stars
    · 8 ratings
    A Distant Worlds StoryFound on an abandoned salvage with no memory of who she is or how she ended up there, she becomes the salvage claim that powerful men will kill for. A truthsayer and a genetically tampered with Bruha, she has one chance to escape sexual slavery to a tyrant....His Brother.Lucan Warrung rules his pirate moon with an iron fist...
  • Reality Bites by Gail Koger

    Reality Bites by Gail Koger

    Rated: 4.10 of 5 stars
    · 10 ratings
    Bree never thought her dimwit act, military grade mace, cattle prod, or dumping a ton of stinky manure on Jaylan's head would encourage his pursuit...
  • To Catch A Warrior by C.L. Scholey

    To Catch A Warrior by C.L. Scholey

    Rated: 4.10 of 5 stars
    · 10 ratings
    Titus, leader of the southern Zargonnii, has made it his mission to find a single female he was placed in charge of months earlier; a female he lost while trying to save her; a female he cannot find. His determination leads him to the extreme. The only place left to look is a planet within a sun. A planet full of ice and snow and emptiness, except for one little female, Zabbie...
  • Sarazen's Claim by Isabel Wroth

    Sarazen's Claim by Isabel Wroth

    Rated: 4.07 of 5 stars
    · 14 ratings
    AUTHOR'S NOTE: In answer to all the very important comments, this is the professionally re-edited version, previously released on July 24th. This book is PART OF A SERIES. Not a HEA and not a Cliffhanger...somewhere in between...
  • The Playful Prince by Michelle M. Pillow

    The Playful Prince by Michelle M. Pillow

    Rated: 4.07 of 5 stars
    · 14 ratings
    To play. Prince Quinn, royal Ambassador, isn't looking for a serious relationship. In fact, he's never even considered it. Hopping from lover to lover, he's content to enjoy himself, never taking anything but his work seriously. However, when Dr. Tori Elliot is sent to the palace to test for biological weapons, he can't seem to stay away from her. Or not to play...
Rules of Engagement by Kaitlyn O'Connor
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