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  • Entangled by the Alien Mercenary

Entangled by the Alien MercenaryA Steamy Sci-Fi Monster Romance

Monster Mercenary Mates #4 / 10
by Robin O'Connor
Entangled by the Alien Mercenary: A Steamy Sci-Fi Monster Romance (Monster Mercenary Mates #4) by Robin O'Connor
★ 10.00 / 1
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Out from under my brother’s thumb, I want only one thing: survive. Falling for my green protector? Definitely not part of the plan.

Elyssa
I’ve spent my life under my brother’s iron control. When I finally escape, my goal is simple: deliver the data I stole to the one person I can trust. But fate has other ideas.

An explosion leaves me stranded and surrounded by my brother’s vengeful gang. Desperate, I have no choice but to trust the last male I should—a green-skinned, feral warrior who’s as deadly as he is tempting. Tass claims he’s here to protect me, but the look in his eyes says something far more dangerous: he wants to claim me.

Tasseloris
I’ve got something to prove. As the newbie on the crew—and the one everyone mocks for my green hue—I’m determined to show I’m more than capable. When I’m sent to retrieve a contact carrying vital intel, I know this is my chance.

Then I meet Elyssa.

She’s beautiful, fierce, and entirely mine. Protecting her is no longer a mission—it’s my purpose. To keep her safe, I’ll take on her enemies, beg for help from those who once cast me out, and even harness the powers I’ve long feared to use.

When she’s ripped from my arms, nothing in the universe will stop me from getting her back. Not even fate itself.

This is book four in the Monster Mercenary Mates series. This sci-fi monster romance features one outcast green-skinned warrior with secret powers, a not-so-damsel on the run with trust issues, and a steamy HEA.

Explicit Novel

  • Romance
  • Fated Mates
  • Aliens
  • Sci-fi Romance
  • Action/Adventure
  • Steamy
  • Fantasy
  • Mercenaries
  • Cute Sidekick
  • Forced Proximity
  • Redemption
Amazon: Check Best Offer

Science FictionRomanceAlien RomanceMonster RomanceAdult
Release date: March 11, 2025 (Princely Gates Publishing)
Reviews and Comments (1)

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Robin O'Connor

Robin O'Connor is a writer who thrives in the wild, imaginative worlds of sci-fi and monster romance, where the stakes are high, the passion runs deep, and the heroes are as strong as they are undeniably sexy. Known for her steamy stories filled with alien heroes and quirky heroines, Robin crafts tales that combine heart-pounding adventure with sizzling chemistry, all wrapped in a fantastical universe.

Living in a house that’s equal parts cozy and chaotic, Robin shares her space with her husband, their four-year-old son, and a collection of books—hundreds of them, all hers—and computer parts that look straight out of a mad scientist’s workshop. As someone who’s always juggling a half-dozen projects at once, Robin’s home is never dull. Yet, despite her busy life, she always makes time for her readers. Whether it's posting quirky extras, sharing cover reveals, or answering fan questions, she’s active on social media, building a strong connection with her audience.

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Robin’s most popular works include Beast Unburdened, the first book in the Gladiators of the Vagabond series, which has captivated readers with its compelling characters and otherworldly thrills. She also pens the Serpents of Serant series, where fans can dive into the sultry world of naga warriors, starting with The Naga Outcast's Unwanted Mate and The Naga Maverick's Determined Mate. Her stories are known for their playful yet passionate tone, blending romance with high stakes and thrilling plot twists.

When she’s not writing, Robin can be found immersed in all things nerdy—from books to tech to podcasts. Always experimenting with new ideas and concepts, she’s constantly pushing herself to create stories that are both entertaining and captivating.

For readers who enjoy romance that’s out of this world, packed with tension, wit, and a healthy dose of heart, Robin O'Connor’s books are a must-read. With each new release, she invites her audience deeper into the vibrant, intense universes she’s created, and there’s always more to discover.

Monster Mercenary Mates

In a world where danger lurks around every corner and power comes with a price, Monster Mercenary Mates introduces readers to a universe where mercenaries aren’t just soldiers—they’re monstrous beings bound by loyalty, honor, and passion. This is a series where forbidden desires collide with fierce battles and dangerous stakes, offering a heady mix of action, romance, and unrelenting suspense.

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Set in a gritty, high-stakes world where mercenaries are both feared and revered, Monster Mercenary Mates immerses readers in a universe where combatants aren’t just human but monstrous, each with their own unique abilities and darker sides. The mercenaries are powerful creatures—shapeshifters, beasts, and warriors—who walk the line between heroism and destruction, their loyalty to each other being their greatest strength and their deepest vulnerability.

The series doesn't shy away from complexity. As these mercenaries face daunting missions and unravel dangerous plots, they also wrestle with their own identities and emotions, making their journeys deeply personal. For every fierce fight, there’s a passionate connection that’s built on trust, raw attraction, and the undeniable bond of being mates. The chemistry between characters is electric, and the romance is far from predictable. Every relationship is as complicated and nuanced as the world they navigate.

What makes Monster Mercenary Mates stand out is its ability to blend intense world-building with multi-dimensional characters. Readers are drawn into a setting where power, betrayal, and survival are ever-present, and yet, amid all the chaos, there is always the hope of finding something real—whether it’s a love that transcends boundaries or the camaraderie forged through battle. The monsters in this world are not just scary—they’re compelling, deeply human in their struggles, and utterly irresistible.

With sharp, engaging writing, Monster Mercenary Mates promises to keep readers on the edge of their seats, eager to see what happens next. Each installment weaves a tale that explores not only the battles fought outside but the ones waged within. It’s a series about survival, loyalty, and the monsters within us all, and once you enter this world, you won’t want to leave.

If you're looking for a series that mixes steamy romance with high-action adventure, Monster Mercenary Mates offers the perfect escape into a world where nothing is what it seems and the only thing stronger than their monstrous nature is the bond they share.


Monster Mercenary Mates consists of nine books and series is set to expand with the upcoming release of one more book. The current recommended reading order for the series is provided below.

Caught by the Alien Mercenary (Monster Mercenary Mates #1)
★ 10.00 / 1
Stolen by the Alien Mercenary (Monster Mercenary Mates #2)
★ 10.00 / 1
Betrothed to the Alien Mercenary: A Steamy Sci-Fi Monster Romance (Monster Mercenary Mates #3)
★ 10.00 / 1
Entangled by the Alien Mercenary: A Steamy Sci-Fi Monster Romance (Monster Mercenary Mates #4)
★ 10.00 / 1
Saved by the Alien Mercenary: A Steamy Sci-fi Monster Romance (Monster Mercenary Mates #5)
★ 10.00 / 1
Chased by the Alien Mercenary (Monster Mercenary Mates #6)
★ 10.00 / 1
Tempted by the Alien Mercenary: A Steamy Alien Sci-fi Romance (Monster Mercenary Mates #7)
★ 10.00 / 1
Claimed by the Alien Mercenary: A Steamy Alien Sci-fi Romance (Monster Mercenary Mates #8)
★ 10.00 / 1
Stalked by the Alien Mercenary (Monster Mercenary Mates #9)
⧗ 10.00 / 1
Seduced by the Alien Mercenary: A Steamy Alien Sci-fi Romance (Monster Mercenary Mates #10)
⧗ 10.00 / 1

Reviews and Comments

03/15/2025
Chelsea K avatar
Chelsea K
695 books, 519 reviews, 227 posts
★★★★★★★★★★ 10 / 10

Tasseloris (AKA Tass) and Elyssa were a great couple that I enjoyed getting to know in this book & I LOVED Nelly. It was nice getting to see a bit more of Solear and Brace in this story as side characters as well and I look forward to getting to know more members of the Varakartoom as the series continues and seeing who the next book Saved by the Alien Mercenary will be about.

I received a free advanced reader copy of this book from the author and am voluntarily leaving a review.

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