Threesome Books

Ten doors. Ten monsters. Ten sessions of interactive data collection.

With a PhD from MIT and crushing student loans, Cat Woods accepts a suspiciously well-paid job "collecting samples" from creatures in an underground lab focused on STEM (Sex, Tech, Experiments, and Monsters).

Cat should be terrified… so why does she keep wanting to open the next door?

TW: nonstandard penetration, fluids (various), cumulative data, butt crawling, bodymorpherotica, impossibly large peens

Nikolai. Braxton. Derik. Three alphas who have pledged to protect the humans in their territory. All they ask in return is one night with the virgins of the villages, one night to take them under the blood moon and complete the ritual. This year is Lorelai’s turn. A winter born, cursed—or blessed—with powers rarely seen, Lorelai has been shunned by the other villagers her whole life. Once she’s taken to the wolves’ mansion, she takes matters into her own hands. After all, what if one night just isn’t enough?

Age Rating: 18+

"You have always been mine.”

Mina never expected to see her stepbrother again—let alone like this. But when she steps into a secretive club, she walks straight into the arms of the one man who's been watching from the shadows… and waiting to make her his. Ronan, the ruthless head of Boston’s crime syndicate, doesn’t just want her—he owns her now. Years of silent obsession have built to this moment, and he won’t let anything—or anyone—stand between them. As enemies circle and the syndicate teeters on the edge, one thing’s clear: he’s not letting her go, no matter how dark things get.

Kassia's life takes a dramatic turn when she meets her new stepbrother, Grayson. Instantly captivated by his commanding presence, she finds herself navigating an uncharted sea of emotions. A chance encounter transforms their dynamic, leaving Kassia at the mercy of a growing attraction that defies all rules. Torn between what she feels and what she knows is forbidden, Kassia must decide if she’s ready to cross the line—or risk losing everything.

I found myself unconsciously leaning closer to him. Despite being kind of nerdy, he was in good shape. Muscles everywhere filled out his clothes nicely.

How did you feel when you started a new school? Nerve-racking, right? Making matters worse, imagine that your new school is full of supernaturals. That’s what happens to Catalina. She’s not sure she belongs there until she finds her mates - Mateon, Lucien, Nick … Wait, how can one have so many mates?

Age Rating: 18+

Lief, Torsten, and Erik have been searching for their beloved queen for centuries after an evil sorcerer cursed them to live without her. They've almost given up hope...until one day, on an archaeological dig site in Norway, a girl with hair as white as snow appears, inspiring fresh hope for an end to their search. Runa Liv grew up listening to her Grandma's stories of three kings and their beloved queen, desperate to learn their true ending. She doesn't know what she's getting herself into when three handsome giants seduce her, but soon it seems the ending to the stories of her childhood might be entirely hers to write. With three fine Viking kings falling at her feet, the fight of a lifetime seems too tempting to resist.

Age Rating: 18+

She was rescued by the Borders pack, but identical triplets with striking looks have picked up her scent and become fixated with her. Despite her attempts to flee, their prowess makes escape seem futile.

With the Mating Moon approaching, they're determined to share her, for she's rare among the seven breedable females.

“She won't be going anywhere until we've had our fill of her. And under a Mating Moon, us males are insatiable.”

Della, a blue-haired outcast, discovers she’s not the monster her parents claimed—she’s something much darker. After being attacked, she learns she’s a demon and is taken to Solomon Academy to harness her mysterious powers and control her growing hunger. But Della isn't just any demon; no one knows what she truly is. As she navigates a world filled with dangerous secrets and deadly enemies, she must figure out who she is—with the help of some intriguing allies and the threat of others who might want her dead.

After months of trying to make a baby, Terry and Donald are stuck in a rut. They head out for a wild weekend away with Peter and Kristal…only to find that their friends are a lot wilder than they’d bargained for.

Attractions sizzle. Jealousies simmer. Can the two couples make it through the weekend with their relationships—and their libidos—intact?

“Stay here, pet.” Dane’s eyes were filled with lust. “Stay with us. Be ours. Meanwhile, Aneurin was looking at me like I was the most beautiful girl in the world. Be theirs? Stay with them? Their touch fogged my mind. And before I knew it, his lips were on mine.

Summer, a fiercely independent princess, suddenly finds herself in the clutches of domineering and tantalizing Twin Dragon Lords. Can she save herself and her kingdom, or will she fall for their darkly seductive charm?

Age Rating: 18+

In the town of Bluewood Cove, Tayla is drawn into a dangerous world of drug dealers and illegal activities after meeting Logan's lodger, Jess. At a beach party, she catches the attention of the powerful and mysterious Raffiel Brothers. Meanwhile, Walker, a wealthy and dissatisfied man, becomes obsessed with finding Tayla after a passionate encounter at a party. As their paths intertwine, Tayla is torn between her attraction to the Raffiel Brothers and her growing feelings for Walker and his second in command, Hayden. Unbeknownst to her, Walker and Hayden are involved in a dangerous world of violence and manipulation. Despite the chaos and danger surrounding them, Tayla begins to explore her desires and embarks on a complicated and passionate relationship with both men.

Age Rating: 18+

They used to make her life miserable—every taunt, every smirk, every stolen moment meant to break her down. But growing up didn’t erase the magnetic pull she’s always felt toward the Drake twins. Now, seven years later, they’re back in her world—older, darker, and twice as tempting. Their arrogance is still there, but so is something new flickering behind those wicked eyes. Desire. Challenge. A dangerous game she swore she’d never play again. She tells herself she should walk away, but the truth is she’s never been good at resisting them—or the delicious kind of chaos they bring.

Madison thought she had it all figured out—until her boyfriend decided to have an affair with her best friend (ouch, right?).

But who needs a lying ex when you’ve got two insanely hot, totally off-limits twins who’ve been making your heart (and other things) race since forever? 🥵

Ethan and Levi are trouble in all the right ways, and when they reveal their feelings, things get hotter than a bonfire. Navigating a steamy, scandalous love triangle? Check. Uncovering juicy family secrets? Double check. This is one wild ride, and Madison’s about to find out if three really is a crowd… or just right. 😏🔥

Zyon has been living on the streets since his parents abandoned him when he was five. Now at age twenty, he’s resigned himself to a life of solitude and living in his alleyway. But little does he know, his best friend Seàn is trying to save up enough money to provide for the both of them. And if that’s not enough, neither of them know about the mysterious Axel, who’s keeping a close eye on both of them.

Age Rating: 18+

Mafia brothers Max and Dimitri have no problems taking what they want. When good girl Kyle is forced into a life she never wanted to be part of, she finds herself questioning everything she knows about life, love, and the mob.

Age Rating: 18+ (Content Warning: Rape & Violence)