Books like 'Erstwhile'
Readers who enjoyed Erstwhile by H. E. Trent also liked the following books featuring the same tropes, story themes, relationship dynamics and character types.
futuristic science fiction poly (3+ people) menage bisexual m-m-f warrior-heroine heroine sleuth queer forced proximity
-
Susix by Amelia Rademaker
Being abducted by aliens is terrifying. Everything after that? Pretty boring.Cece Levine didn’t believe in aliens. That is, right up until she was abducted. Life in space is not what she expected. She lives in a cage. She's left alone all the time. And the boredom is driving her insane.When a thief who is more snake than man, mistakes her for an exotic pet, Cece decides to just roll with it... -
Fallen Star by Morgan Hawke
Isabeau Fallon, the Fallen Star is one of the finest thieves on Dyson's Ring station - until she's caught by the Skeldhi hunter, Sobehk, who captures her and makes her a sex-pet. Trapped and altered into a skeldhi-human hybrid known as a rehkyt, her past is a closed door - until it literally comes back to haunt her in the form of a E'sey Khan... -
Space for More by Emily Antoinette
All Dr. Eden Mori wanted was to expand her horizons on the galaxy's largest space station, but when the only way to stop a black market sale of dangerous medical schematics is to get close to the data dealer, she's tasked with stopping him. Her partner on this mission? The dealer's estranged, hot-tempered mate...Categorized as:
bisexual queer menage forced proximity futuristic m-f-f science fiction non-human-heroine -
Corsairs: Bethiah by Ruby Dixon
I have a reputation for being the most chaotic bounty hunter in the universe.What they don’t know? My private life is just as messy. I’ve got a sweet, innocent cloned human woman who wants to be my lover…and a grumpy cyborg paramour who might be jealous that he’s not the center of attention.The solution?A triad...Categorized as:
menage bisexual science fiction poly futuristic sweet heroine sassy heroine strong heroine -
-
Key to the Dead Fall by Susan Trombley
Rated: 4.29 of 5 stars · 11 ratingsThe 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...Categorized as:
menage science fiction futuristic aliens poly competent heroine fated-mates length-medium -
Her Alien Healers by Susan Hayes
Rated: 4.25 of 5 stars · 8 ratingsShe’s ready to move on to the next chapter of her life — She just never expected it could be a love story.Jodi Clark has been many things over the a doctor, a wife, and a divorced single mother. Now, there’s just one more thing she needs to do – for once in her life, she’s going to put herself first.An unexpected invitation to Haven colony comes at the perfect moment...Categorized as:
menage aliens reverse harem futuristic science fiction mature couple poly length-novella -
Tone of Voice by Kaia Sønderby
Xandri Corelel has spent six months living among the Ongkoarrat after her unceremonious firing from the crew of the Carpathia, and though she misses her home, she has settled into her new life. Then Diver arrives with news that changes everything. The Hands and Voices--squid- and whale-like symbiotic aliens--are masters of bio-engineering and grow a wide variety of species of coral... -
Targeted by Susan Hayes
Rated: 4.14 of 5 stars · 13 ratingsAlliance Commanders Brandt Carver and Hawke Summers have a new mission. Take command of Space Station: Alpha X2, get it running smoothly again, and find out how the last station commander wound up murdered in the middle of a Krytos sanctuary... -
Testing Pandora by Kaia Sønderby
In the far future, genetic engineering is used to strip all sapient species of disability. But when humans have a brief fad of natural birth, disabled children start reappearing. They're quickly termed "Pandoras," the value of their very lives brought into question, and laws are put into place to prevent their births from happening ever again...Categorized as:
queer bisexual science fiction aliens futuristic disabilities and marks neurodivergent length-short -
Tina by Tracy St. John
Rated: 4.17 of 5 stars · 6 ratingsTo be loved is all Tina ever wanted. She never dreamed her prayers would be answered by the enemy.Aspirant Tina Novak, living on Europa’s convent colony, has no place to call her own. First rejected by her father, now being sent away by Mother Superior, where can a young woman with no prospects go?The question is delayed by a Kalquorian invasion that takes the aspirants and nuns prisoner... -
Consorts of the Red King by Eden Winters
In deepest space the ruthless Federation lays waste to one rebel colony after another, leaving comrades-in-arms Van Orskey and Tayn Kassik without family, without a home, and without hope. With nothing left but each other, they run contraband and smuggle fugitives from the safety of their ship, the Cormorant—with the occasional clandestine mission for the rival Coalition thrown in... -
The Uncertain Scientist by K. Webster, Nicole Blanchard
I had everything I ever wanted. I was brilliant, successful, esteemed. Alone. But I didn’t mind. I liked being alone. Until they stole me. And I wake up, captive, pregnant with an alien baby—and still a virgin. For a race of freaks nearing extinction, there seems to be far, far too many of them... -
Claimed for Their Use by Ivy Barrett
Held captive by a brutal drug cartel and facing an uncertain fate, the last thing Jessica Saint Claud expects is to be rescued by two huge, fiercely handsome alien warriors, but the real shock comes when the two Ventori commanders make it clear that she now belongs to them. They will use their beautiful little human as thoroughly as they please, and she will submit or be punished... -
The Other Side by Sara Page
Rated: 3.88 of 5 stars · 8 ratingsBeing pregnant with Ravager babies isn't easy. You have to deal with things like having not one but two overprotective baby daddies breathing down your neck all the time. Cravings for disgusting food combinations. And weird alien side effects, like randomly falling through the floor and into another dimension called the Other Side. The Other Side is a place of darkness and void... -
-
Crux: A Sci-Fi Romance by H.E. Trent
Erin McGarry fears she’s becoming the very thing she hates. She traveled to the planet Jekh to get her big sister, Courtney, out of a jam, and now Erin has become a colonist, too. In spite of the planet’s unstable political environment and ongoing rioting by the native Jekhans, Erin fears that retreating to Earth would mean she’d never see Courtney again... -
Aria's Awakening by Stacy Jones
A deadly alien arena isn’t the place to fall in love… For the last three years, Special Agent Aria Taylor’s nights have been filled with images of battling alien beings in a foreign land with purple skies and two suns... -
Desperate Omega by Lizzy Bequin
First they'll make me beg for mercy.Then they'll make me beg for more.I never asked for this. Never asked to be an omega. Never asked to go into heat. But my heat is coming, whether I want it or not, and soon my scent will draw the alphas in like wolves to prey.I had a plan. I thought I could deal with the urges on my own.I was wrong...Categorized as:
height-difference forced proximity menage warrior-heroine science fiction futuristic omegaverse m-f -
Night of the Shayde by Lili Zander
Rated: 3.75 of 5 stars · 8 ratingsThe Vampyrs of Shayde want more than just my blood… The first night, I was bitten. The second night, I was hunted. The third night—the night I was marked for death—I attracted the attention of three Shayde enforcers, the dangerous and enigmatic Vampyrs, Saber, Zeke and Nero. To earn my freedom, I just need to survive one more night. I need to make it through the ultimate trial... -
Finders by Melissa Scott
Rated: 3.75 of 5 stars · 8 ratingsCassilde Sam is a barely solvent salvage operator, hunting for relics in the ruins left by the mysterious Ancestors—particularly the color-coded Elements that power most of humanity’s current technology, including the ability to navigate through hyperspace. Cassilde is also steadily fading under the onslaught of Lightman’s, an incurable, inevitably fatal disease... -
Cyborgs' Claim by Michele Mills
Rated: 3.71 of 5 stars · 10 ratingsThree outlaw Cyborgs. One human female... Axel, Steel and Gage. Merciless supersoldiers. Forbidden cybernetic experiments gone awry. They escaped from their Hurlian programmers and now live hidden in a desolate area of space where few enter and none leave. They crave one female to claim, one who will satisfy all their desires... -
Alien Breed: A Dark Reverse Harem Alien Romance by Loki Renard
I am fertile, and I am owned. In a lawless galaxy, a human woman is a universal breeding vessel.I have been bought by five aliens.They want to use me as their mate.They want to fill me with their seed.They want me to bear their babies.But my past is catching up with me.Powerful forces want me dead...Categorized as:
forced proximity science fiction dystopian length-short explicit-open-door futuristic poly -
The Dark Princes by Sara Page
Rated: 3.63 of 5 stars · 10 ratingsI'm alive. I survived the wilds of that remote planet I crashed into, and I've been trying to get to know my new alien lover before I return home and introduce him to my father. Yeah, so not looking forward to that introduction but at least I'm not knocked up... yet. Everything is going great until we intercept a transmission from my home planet...Categorized as:
menage demons military science fiction multicultural futuristic aliens reverse harem -
Claimed by the Alien by Nessa Claugh
Adina remained on Earth to stay with her husband, even though she was the perfect candidate for the alien bridal program on Lukrim. She has a good job, a husband who loves her, and a hobby watching old movies where the sky was still blue. She's worked her way up to be the director at the very program she denied herself from, but now her alien boss on Lukrim wants more from her...Categorized as:
menage height-difference m-f-m aliens science fiction insta-love poly non-human-hero -
Nova Academy by Natasha Campbell-Jones
ONE UNWITTING CYBORG AGAINST THE UNIVERSE.I entered The Program as a small child, purely human and terminally ill.I escaped The Program as an adult, sort-of human and virtually indestructible.But I left someone behind.I enrol at Nova Academy, an elite school for military training, after discovering their connection to The Program, desperate to find my friend. But there’s a catch...Categorized as:
forced proximity warrior-heroine bisexual queer m-m-f science fiction length-medium futuristic -
-
Night of the Dragons by Miranda Martin
Rated: 3.61 of 5 stars · 12 ratingsBroken pod, wrecked ship, no water in sight. But Piper Sage is a survivor. Diagnosed with an aggressive terminal cancer, the doctors on board her generational spaceship had no choice but to put her in stasis, hoping to keep her alive until a cure could be found. When she wakes, it's not to a miracle but a nightmare. Two blazing suns, nothing but sand and more sand... -
Alien Savior by Nicole Krizek
Rated: 3.53 of 5 stars · 11 ratingsLacy Woods thought that there could be nothing worse than being stolen from Earth by an alien poacher, until she's thrust onto the auction block and sold as a slave on an alien planet. Standing on stage surrounded by the galaxy's nastiest criminals, she has little hope... -
Ecstasy From the Deep by Octavia Kore
An enticing savior, an old love, and one deranged alien hell-bent on destroying it all. The seemingly endless war with the Grutex has caused many inconveniences for Amanda, but none of those have been as bad as losing the funding for the project she is working on that is supposed to help save humanity... -
Initiation by Ruth D. Kerce
Rated: 3.51 of 5 stars · 12 ratingsXylon Warriors - Initiation By Ruth D. Kerce Book 1 in the Xylon Warriors series Warrior Braden Koll is on a mission to retrieve DNA-compatible women for breeding on the planet of Xylon. His current assignment is to locate an Earth woman-Alexa Sandor-found to be a match, and sexually initiate her into The Lair of Xylon... -
Cora by N.A. Jameson
If a girl screams in a forest and nobody hears her, does she exist?Cora was seventeen when the apocalypse started. Three years later, Cora hasn’t seen or spoken to anyone since that day. She’s not sure she is capable of making sound anymore, and she certainly doesn’t have any reason to.That is until four men walk into her house and make it their own...Categorized as:
forced proximity bisexual m-m-f queer height-difference menage dystopian science fiction -
Our Pet by S.M. Matthews
Abducted by aliens? Yes. Mistakenly bought as a family pet? Yep. Actually, unexpectedly starting to enjoy the ride? I just might be. I've been abducted, sold, and then sold again, all before I even knew what was going on. Luckily for me, I might just have been bought by the three nicest....guys....in the universe...Categorized as:
menage height-difference reverse harem aliens science fiction m-f-m poly creative-anatomy
Find out more about romance.io.
Get recommendations by genres & tropes
Use the romance book finder to mix and match over 100 content keywords to find the books that match your preferences

Or - use our amazing romance book finder to get recommendations based on your favorite content tropes and themes. Mix and match at will.