Books like 'Double Down'

Readers who enjoyed Double Down by Susan Hayes also liked the following books featuring the same tropes, story themes, relationship dynamics and character types.

futuristic  sc-fi  romance  action / adventure  steamy  aliens  paranormal  cyborgs  reverse-harem  suspense 

  • Hoards and Harbors by S.M. Olivier

    Hoards and Harbors by S.M. Olivier

    Rated: 4.60 of 5 stars
    · 10 ratings
    Navigating our new reality has its ups and downs. My relationships with my men and most of my family continue to grow. Together, we've made it our duty to help those who can't help themselves. We're determined to ensure good prevails despite the evil forces against us. We make new friends, giving us hope we're not alone in our mission...
  • War by A.G. Wilde

    War by A.G. Wilde

    Rated: 4.50 of 5 stars
    · 8 ratings
    ...
  • Rogue Cyborg by Grace Goodwin

    Rogue Cyborg by Grace Goodwin

    Rated: 4.40 of 5 stars
    · 10 ratings
    He 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...
  • Her Cyborg Beast by Grace Goodwin

    Her Cyborg Beast by Grace Goodwin

    Rated: 4.33 of 5 stars
    · 12 ratings
    Caroline Jane (CJ) Ellison has a gift for analysis. When a Wall Street deal goes bad, the choice between prison or the Interstellar Brides Program is a no-brainer. She'll go. She'll leave Earth, her past, and her mistakes behind. The decision is logical, not emotional. Until she wakes up on another world with a huge Atlan Warlord, her matched mate, refusing to claim her...
  • Hitched to the Alien General by Mina Carter

    Hitched to the Alien General by Mina Carter

    Rated: 4.43 of 5 stars
    · 17 ratings
    Her perfect man is a big, scarred alien war hero. Pity he only see’s her as a warrior, not a woman... Kenna Reynolds loves life in the Imperial Court. The latharian culture fascinates her, and she values the friendships she’s made amongst the sentinel women, most bonded to Latharian males, and a few with babies on the way...
  • 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...
  • Tamed for Their Use by Ivy Barrett

    Tamed for Their Use by Ivy Barrett

    Rated: 4.38 of 5 stars
    · 8 ratings
    Though she is grateful to the Ventori who rescued her from a notorious drug cartel, Nichole Romano is none too pleased at being held in their custody and tested for her compatibility as a mate. Her patience runs out when two huge, handsome warriors carry her off against her will, but despite her fury she is quickly stripped bare and her defiance merely earns her a sound spanking...
  • 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...
  • Vengeful Heart by Tiffany Roberts

    Vengeful Heart by Tiffany Roberts

    Rated: 4.33 of 5 stars
    · 9 ratings
    When his mate is threatened, nothing burns hotter than his wrath.Against all odds, Arcanthus found Samantha, his beautiful, sweet terran mate. His fated one. Her love shattered the barriers around his heart.After defeating a ghost from his past, Arc thinks he and Samantha are safe to move on with their lives. But she has a past of her own, and it refuses to let her go.He nearly lost her once...
  • Key to the Dead Fall by Susan Trombley

    Key to the Dead Fall by Susan Trombley

    Rated: 4.30 of 5 stars
    · 10 ratings
    The sequel to Into the Dead Fall, which was released as part of a two-book set with The Scorpion’s Mate. A fated mate she doesn’t want. An enigmatic alien she shouldn’t want. Finding your way in the Dead Fall isn’t easy, but it’s nothing compared to figuring out what your heart truly desires...
  • The Complete Marriage Raffle Series Boxset by Stasia Black

    The Complete Marriage Raffle Series Boxset by Stasia Black

    Rated: 4.30 of 5 stars
    · 10 ratings
    In the New Republic, every woman must marry five men. It’s the law. Welcome to the apocalypse. Theirs to Protect Nix never put his name in the marriage raffle for a reason. He doesn’t need a woman. There aren’t that many to go around anyway after a genetically engineered virus wiped out 90% of the female population. He has his job as head of the Security Squadron and it’s all he needs...
  • Cyborg Seduction by Grace Goodwin

    Cyborg Seduction by Grace Goodwin

    Rated: 4.25 of 5 stars
    · 12 ratings
    There is nowhere to hide from a Hunter determined to find his mate. Single mother Lindsey Walters is a blogger and the love of her life is her four-year-old son, Wyatt...
  • 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...
  • Rescued by her Alien Protector by Mina Carter

    Rescued by her Alien Protector by Mina Carter

    Rated: 4.44 of 5 stars
    · 14 ratings
    Prepared to put her life on the line, she didn’t expect to lose her heart. Vice President Madison Cole is used to having a target on her back. Being captured by aliens? An acceptable risk to get what she needs. What she didn’t count on was falling for the ‘enemy’, a handsome alien warrior with a hero’s heart...
  • Krac's Firebrand by S.E. Smith

    Krac's Firebrand by S.E. Smith

    Rated: 4.28 of 5 stars
    · 23 ratings
    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...
  • Alien AI's Marine by Mina Carter

    Alien AI's Marine by Mina Carter

    Rated: 4.48 of 5 stars
    · 11 ratings
    He'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...
  • Ancient Thought by Viola Grace

    Ancient Thought by Viola Grace

    Rated: 4.33 of 5 stars
    · 6 ratings
    Is 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 ratings
    Programming 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...
  • Twisting Sanity by Viola Grace

    Twisting Sanity by Viola Grace

    Rated: 4.33 of 5 stars
    · 6 ratings
    When 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...
  • Clan and Command by Tracy St. John

    Clan and Command by Tracy St. John

    Rated: 4.33 of 5 stars
    · 6 ratings
    Losing the one man he loved convinced Piras he would never have a chance at happiness. He is too different from the other members of the Dramok breed to attract a Nobek warrior and Imdiko nurturer to his clan. Unwilling to pretend to be someone he is not, he faces a lonely future. Nobek destroyer captain Kila’s one night with Piras was a shocking revelation...
  • Cyborg Boss by Cara Bristol

    Cyborg Boss by Cara Bristol

    Rated: 4.33 of 5 stars
    · 6 ratings
    His 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 ratings
    Terror 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...
  • 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...
  • 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 ratings
    HUMAN 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...
  • The Sands of Argurumal by S.J. Sanders

    The Sands of Argurumal by S.J. Sanders

    Rated: 4.25 of 5 stars
    · 8 ratings
    With the expectation of a three-year pregnancy, Terri assumed that she had all the time in the world before she had to face the realities of upcoming motherhood. Time for adventures, travel, and working side by side with her mate...
  • Dark Strength by Cynthia Sax

    Dark Strength by Cynthia Sax

    Rated: 4.25 of 5 stars
    · 8 ratings
    The Bigger They Are, The Harder They Fall. Balvan, the Refuge’s Gatekeeper, is huge, green, and has a reputation for crushing skulls. He’s a modified humanoid, genetically designed to be the ultimate warrior. One of a kind and considered monstrous by many, he never expects to find his mate, the one female meant for him...
  • Stolen by Raze by Lolita Lopez

    Stolen by Raze by Lolita Lopez

    Rated: 4.25 of 5 stars
    · 8 ratings
    Captured in a government raid, Ella is thrown into a prison transport bound for the mountain labor camps. She never expects her rescue to come at the hands of Raze, the handsome sky warrior who all but stole her heart after Dizzy’s wedding. Considered a high-value asset by the Shadow Force, Ella is given to an arrogant brute of a pilot for safekeeping—and collaring...
  • Warlord's Baby by Nancey Cummings

    Warlord's Baby by Nancey Cummings

    Rated: 4.25 of 5 stars
    · 8 ratings
    What 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..
  • 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...
  • Salvation by Laurie Roma

    Salvation by Laurie Roma

    Rated: 4.20 of 5 stars
    · 10 ratings
    Officer Skylar Aris is a woman with a troubled past. As a Class-A Conduit, she is beautiful and deadly, making her stand out among the rest of the elite soldiers. She has worked hard to succeed as one of the only female interrogators in the Security and Interrogation Division, but everything she has dreamed of is put in jeopardy when she’s given an ultimatum that will change her fate...
  • Earth Files: Book 1 by Anna Carven

    Earth Files: Book 1 by Anna Carven

    Rated: 4.20 of 5 stars
    · 10 ratings
    As 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...
  • Draekon Holiday by Lee Savino, Lili Zander

    Draekon Holiday by Lee Savino, Lili Zander

    Rated: 4.20 of 5 stars
    · 10 ratings
    Day Two-Hundred-Something on the Prison Planet... ...And things are finally settling down. Life is slowly getting back to normal. Babies that won't sleep through the night? Check. Pregnancy cravings? We've got those, too. Fresh starts? Check. A new chapter in our lives? Check again. And people are leaving. Wait, what? If this is our last chance to be together, it's time to celebrate...
  • Warriors' Claim by Michele Mills

    Warriors' Claim by Michele Mills

    Rated: 4.20 of 5 stars
    · 10 ratings
    Three 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...
  • A Darkside Interlude by Anna Carven

    A Darkside Interlude by Anna Carven

    Rated: 4.32 of 5 stars
    · 16 ratings
    Commander 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...
  • Tempest by Poppy Rhys

    Tempest by Poppy Rhys

    Rated: 4.17 of 5 stars
    · 12 ratings
    They can't break me.I wasn't prepared for what came after I got arrested and sent to prison. Finding my sister in that hellhole should've been easy.I wasn't prepared to survive an alien planet straight out of a prehistoric nightmare. Facing my fears to withstand the creatures that wanted to eat me, and the four alien men that watched me like a morsel they wanted to sink their teeth into..
  • Mated to the Cyborgs by Grace Goodwin

    Mated to the Cyborgs by Grace Goodwin

    Rated: 4.17 of 5 stars
    · 12 ratings
    FBI Agent Kristin Webster has spent the last eight years tracking and taking down the worst of humanity. She's seen to much to believe she could ever trust a human man, but the promise of a perfect match through the Coalition's Interstellar Brides Program has her settling into the testing chair to be matched to her alien mate...
  • Forged in Shadow by Anna Carven

    Forged in Shadow by Anna Carven

    Rated: 4.21 of 5 stars
    · 25 ratings
    Sergeant Arin Varga has a problem on her hands. She's supposed to be in charge of a squad of peacekeepers. That's something she would normally handle with ease, except that now her people are stuck in Earth's orbit on a doomed superfreighter...
  • 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...
  • Rising from the Depths by Tiffany Roberts

    Rising from the Depths by Tiffany Roberts

    Rated: 4.35 of 5 stars
    · 13 ratings
    Two years after a bloody battle nearly tore his people apart, Kronus finds himself plagued with guilt and without a place to truly call home. And when he saves a blue-eyed human from a razorback, his world is once again turned upside-down. Though he once opposed relations with her kind, he is undeniably drawn to Eva’s pain, loss, and inner strength...
  • Heart of the Deep by Tiffany Roberts

    Heart of the Deep by Tiffany Roberts

    Rated: 4.32 of 5 stars
    · 14 ratings
    HIS HUNTRESS AND HIS HEART Larkin has spent almost a year hunting the monstrous kraken in the hope that they knew the whereabouts of her missing brother. Her efforts finally come to fruition when she and the other rangers capture three of the beasts — but the reality is nothing like the stories they’ve been told, and the kraken are not the monsters she expected...
  • A Few Cyborgs More by Honey Phillips

    A Few Cyborgs More by Honey Phillips

    Rated: 4.34 of 5 stars
    · 13 ratings
    A 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...
  • Bonded To The Alien Centurion by Mina Carter

    Bonded To The Alien Centurion by Mina Carter

    Rated: 4.26 of 5 stars
    · 17 ratings
    Behind ‘enemy lines’ the last thing she expects is a sexy alien warrior determined to make her his… When things screw up in diplomatic talks with the Lathar Dani Black finds herself lined up for the one thing every dyed in the wool soldier dreads… a diplomatic function...
  • A Fistful of Cyborg by Honey Phillips

    A Fistful of Cyborg by Honey Phillips

    Rated: 4.35 of 5 stars
    · 12 ratings
    A 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 ratings
    A 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 ratings
    After 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...
  • 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...
  • Barbarian by Anna Hackett

    Barbarian by Anna Hackett

    Rated: 4.17 of 5 stars
    · 23 ratings
    Abducted by alien slavers, experimented on, and left blind, the last thing doctor Winter Ashworth needs is a big barbarian gladiator in her life, especially an annoying one who thinks she’s small and weak.Rescued by gladiators on the desert world of Carthago, Winter is doggedly working to embrace her new life...
  • End of the Walker by Coralee June

    End of the Walker by Coralee June

    Rated: 4.36 of 5 stars
    · 10 ratings
    The end is here. Dormas is gone. The empire is in ruin, and I'm struggling to come to terms with the girl I've become. My men are the only bright spot left in the empire. We’re stronger than ever. Determined to find Payne and the cure, we comb through all the destruction, searching for him while trying to evade infected Walkers. I just hope we can find him in time...
  • Warlord Sky by Cynthia Sax

    Warlord Sky by Cynthia Sax

    Rated: 4.17 of 5 stars
    · 6 ratings
    No 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...
Double Down by Susan Hayes
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