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Alien Spare

Cosmic Mates #8 / 8
by Cara Bristol
Alien Spare (Cosmic Mates #8) by Cara Bristol
★ 10.00 / 1
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He’s the royal spare with a reputation. She’s the cosmic wild card he never saw coming.

Prince Falkor Myka-Rullok has spent his entire life in second place—second to his brother, second to his planet, and probably second in his parents’ hearts. So why not lean into it? He’s got charm, status, and a reputation as Kaldor’s “Prince of Scandal.” If he can’t be their favorite, at least he can be unforgettable.

But his latest misadventure—where, for once, he’s actually innocent—lands him in hot water. To repair the damage, the king issues an ultimatum: marry the human woman caught in the middle of the mess… or else.

Karma Kennedy isn’t charmed. She came to Kaldor for a fresh start and spiritual clarity—not to marry an arrogant alien prince with perfect hair and a smirk she wants to wipe off his face. She doesn’t care that he’s royalty. She doesn’t care that he’s gorgeous. What she does care about is escaping this forced marriage and getting her life back.

The plan? Stay married just long enough to save face, then go their separate ways.

But fate isn’t letting go that easily.

As the days pass, Karma’s tarot cards start predicting a future she refuses to believe. And Falkor? He’s seeing a woman who might finally put him first.

In a marriage neither of them wanted, they might just find the love they’ve both been searching for… if they stop fighting destiny long enough to let it happen.

* * * *
Cosmic Mates sci-fi romances are released in “duets,” each two-book set is its own mini-series. Books one and two are a set, books three and four are a different mini-series, etc. All the books can be read as standalones.

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Science FictionRomanceAlien Romance
Release date: September 22, 2025
Reviews and Comments (1)

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Cara Bristol

Cara Bristol is a USA Today bestselling author who has carved out a unique niche in the world of science fiction romance. Known for her captivating stories featuring tough alien and cyborg heroes, Cara’s novels take readers on thrilling journeys where strong-willed heroines and brooding, powerful protagonists collide in worlds full of passion, danger, and adventure.

When she's not conjuring up faraway galaxies or envisioning futuristic worlds, Cara enjoys the quiet pleasures of home life. A self-proclaimed homebody, she shares her life with her husband, a wanderer at heart. Together, they travel the globe while checking off items on her bucket list—most notably, visiting all seven continents and, in a lighter moment, petting a squirrel. It's these very contrasts—her love of the familiar and her curiosity for the unknown—that infuse her writing with depth, allowing readers to escape into complex, yet relatable stories.

Read more ...

Cara’s journey into writing began in 2009 with her first erotic romance. Over the years, she transitioned into the world of sci-fi romance, where she found her true calling. With over twenty-seven books published, her most beloved series, like Breeder and Cy-Ops, showcase her talent for blending steamy romance with fast-paced adventure. Cara's books are celebrated for their emotional intensity, strong characters, and the way they explore relationships in otherworldly settings.

An avid reader herself, Cara is deeply influenced by her love of science fiction, adventure, and romance, and this passion is woven throughout her works. Her fans appreciate the way she effortlessly combines high-stakes plotlines with heartfelt emotions, creating stories that are as thrilling as they are touching.

Outside of writing, Cara remains active in her community of readers and writers, frequently engaging with her fans on social media. Whether it's sharing sneak peeks into her upcoming projects, posting humorous extras, or just chatting about her latest squirrel sighting, she loves connecting with her audience.

For those new to her work, Cara offers a free sci-fi romance novel on her website, inviting readers into her universe of unforgettable heroes and heroines. With each new book, Cara Bristol continues to build her legacy as a leading voice in science fiction romance, one passionate, thrilling story at a time.

Cosmic Mates

Not all soulmates are born on Earth. In Cosmic Mates, love is written in the stars—sometimes in alien script, sometimes in instinct—and always with consequences that ripple across galaxies. This series blends sizzling sci-fi romance with pulse-pounding adventure, bringing together interstellar warriors, unlikely heroines, and bonds that transcend planets, species, and logic.

Read more ...

Each story orbits around a central spark: two beings from vastly different worlds navigating cultural clashes, language barriers, and the weight of destiny. But these aren’t just tales of otherworldly attraction—they’re layered, character-driven journeys where survival, sovereignty, and identity hang in the balance. The world-building is immersive without being overwhelming, striking a careful balance between futuristic tech and raw, emotional stakes.

The tone shifts between action-packed tension and deeply personal intimacy, exploring what it means to truly connect—whether through a forced proximity crash landing, a marriage of political necessity, or an instinctual alien claiming that rewrites both hearts and rules. If you’re drawn to slow-burn passion ignited in the vacuum of space, or fierce heroines who hold their ground even on foreign soil, this series delivers the perfect blend of heat, humor, and heart.


Cosmic Mates consists of eight books. The current recommended reading order for the series is provided below.

Escape Clause (Cosmic Mates #1)
⧗ 8.34 / 3
Help Wanted: Wife (Cosmic Mates #2)
⧗ 8.34 / 3
Kiss of Steel: A Cyborg Romance (Cosmic Mates #3)
⧗ 8.50 / 2
Kiss of Fury: A Cyborg Romance (Cosmic Mates #4)
★ 9.00 / 1
Double Take (Cosmic Mates #5)
★ 9.00 / 1
Double Bind (Cosmic Mates #6)
★ 10.00 / 1
Alien Heir (Cosmic Mates #7)
★ 10.00 / 1
Alien Spare (Cosmic Mates #8)
★ 10.00 / 1

Reviews and Comments

09/27/2025
Chelsea K avatar
Chelsea K
703 books, 527 reviews, 229 posts
★★★★★★★★★★ 10 / 10

This was the second book in this duet and while each book in the duet focuses on a different couple so it could be read as a standalone it's better to read both books in the set. I enjoyed getting to know both Falkor & Karma better in this story after getting to know them briefly in the previous book in this set and thought the epilogue was a sweet way of wrapping things up for both couples in this duet. I look forward to seeing what Cara Bristol comes out with next.

Cosmic Mates #07 - #08 DuetAlien Heir (Cosmic Mates #07): Prince Jaryk & KismetAlien Spare (Cosmic Mates #08): Prince Falkor & Karma.

I received a free advanced reader copy of this book via Booksprout and am voluntarily leaving a review.

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