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  • Tempted by the Alien Mercenary

Tempted by the Alien MercenaryA Steamy Alien Sci-fi Romance

Monster Mercenary Mates #7 / 10
by Robin O'Connor
Tempted by the Alien Mercenary: A Steamy Alien Sci-fi Romance (Monster Mercenary Mates #7) by Robin O'Connor
★ 10.00 / 1
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He was built to feed on fear, but I’m the only one who ever tempted him to feel.

Frederique

I woke in a shattered stasis pod, centuries too late, on a world drowning in water and secrets. My mission? Gone. My crew? Dust. And the only being who’s kept me alive since then is an alien mercenary wrapped in living silver and danger. He’s not just terrifying, he’s mesmerizing.

I should keep my distance. I know better. But every time his dark gaze settles on me, every time that shifting symbiont flows over his skin like armor and art, I forget who I was supposed to be. His power should terrify me, but it tempts me. He tempts me.

Even when I discover the truth about my mission. Even when enemies rise and survival hangs by a thread... I still look at him and wonder what would happen if I let myself fall.

The Sineater

She calls me mercenary. Monster.
But she doesn’t run.

I was sent to kill, not to feel. My symbiont craves agony like air, but her emotions, bright and tangled, taste like hope. I want her. Not just her body, but the calm in her thoughts, the fire in her fight. I want to protect that light, even as I know I’ll destroy it.

But I am always hungry. Always feared.
And if I take what I want, I may never let her go…
Even if loving her is the one thing that could break me.

This is a standalone novel and the seventh book in the Monster Mercenary Mates series. This sci-fi monster romance features a darkly sinful ancient warrior, a plucky, bossy FMC, a mysterious animal sidekick, and a steamy HEA.

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Science FictionRomanceAlien RomanceMonster RomanceAdult
Release date: December 9, 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

12/13/2025
Chelsea K avatar
Chelsea K
695 books, 519 reviews, 227 posts
★★★★★★★★★★ 10 / 10

This was a really enjoyable addition to the Monster Mercenary Mates series and it was interesting getting to know The Sineater better as well as his symbiont Val and human mate Frederique. The dynamics between each of them were fun to watch develop and I really enjoyed reading their story. I look forward to reading the next book in this series and getting to know Jaxin better as well as seeing who he ends up with.

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

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