13 Must-Read Sci-Fi Books on Kindle Unlimited

Discover the best sci fi books on Kindle Unlimited for thrilling adventures and imaginative worlds at your fingertips. Dive into your next read today.
BrandMy RatingPrice
By Blaze Ward (Author) Format: Kindle Edition
Best Cheap Pick
8.4/10
By Rebecca Yarros (Author) Format: Kindle Edition
Best for Sci-Fi Newbies
9.6/10
By Pierce Brown (Author) Format: Kindle Edition
Best for Adventure Seekers
9.2/10
By Andy Weir (Author) Format: Kindle Edition
Best for Tech Enthusiasts
9.4/10
By Christopher Coates (Author), D.s. Williams (Editor) Format: Kindle Edition
8.4/10

Best Sci Fi Books Kindle Unlimited

In a galaxy not so far away, the world of sci-fi literature beckons with its mesmerizing tales of adventure, innovation, and the boundless possibilities of the future. For avid readers seeking to dive into these captivating narratives without breaking the bank, Kindle Unlimited offers a treasure trove of mind-bending stories that are just a click away. Join us as we explore the best sci-fi books available on this dynamic platform, where imaginative journeys await at every turn.

Best Cheap Pick: The Science Officer

The Science Officer
Highlights
Original and well-written
Interesting characters and plots
Good for quick reads

We’re excited to introduce The Science Officer, our pick for the Best Cheap Pick in the sci-fi genre!

This gem offers an engaging reading experience without straining your wallet, perfect for those of us who love quality literature on a budget.

With original plots and interesting characters, it's ideal for quick reads during your busy day.

However, be mindful that the novellas are a bit short, and while the price for some stories may seem high, the overall value shines through.

Dive into this universe and discover why it’s a must-read for sci-fi enthusiasts!

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Price history for The Science Officer on Amazon

Best for Sci-Fi Newbies: Fourth Wing

Fourth Wing (The Empyrean Book 1)
Highlights
Captivating character development
Immersive world-building
Action-packed storyline

We couldn’t resist spotlighting Fourth Wing, our pick for Best for Sci-Fi Newbies.

With its captivating character development and immersive world-building, this novel serves as an ideal gateway into the genre.

The story grabs your attention and pulls you into a whirlwind of action, perfect for readers hungry for excitement.

While some may find the slow start or the occasional cringy innuendo a tad overwhelming, we believe the richly crafted narrative and intense moments more than make up for it.

If you’re ready to dive into a fantastical realm, Fourth Wing is definitely a top contender for your Kindle Unlimited list!

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Price history for Fourth Wing on Amazon

Best for Adventure Seekers: Red Rising

Red Rising (Red Rising Series Book 1)
Highlights
Compelling world-building
Engaging character arcs
High action pace

We’re excited to spotlight Red Rising, our pick for the Best for Adventure Seekers!

This electrifying tale transports you to a richly imagined world where action and excitement reign supreme.

With its compelling world-building and engaging character arcs, you’ll be hooked right from the first page.

While some readers may find characterization inconsistent and certain sections a tad slow, the adrenaline rush is undeniable—it’s a wild ride!

Prepare for twists and turns that will keep you glued to your Kindle.

If you’re on the hunt for a thrilling adventure, Red Rising is definitely worth diving into.

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Price history for Red Rising on Amazon

Best for Tech Enthusiasts: Project Hail Mary

Project Hail Mary: A Novel
Highlights
Engaging plot twists
Humorous writing style
Well-researched science

If you're ready to embark on a thrilling voyage through the cosmos, Project Hail Mary is our top pick for tech enthusiasts.

This novel brilliantly intertwines advanced scientific concepts with an engaging narrative that will keep you turning pages.

Although it has a slow start and delves into some science-heavy explanations, the well-researched premise and humorous writing style will reward your patience.

With engaging plot twists that keep you guessing, it's no wonder this book ranks high in the Hard Science Fiction category!

So, grab your Kindle and prepare for a journey that’s as amusing as it is enlightening.

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Price history for Project Hail Mary on Amazon

The Ark

The Ark
Highlights
Engaging plot
Well-developed characters
Thought-provoking themes

We couldn't resist diving into this thrilling sci-fi adventure!

With an engaging plot and well-developed characters, it’s no wonder this title has captured the attention of many.

The thought-provoking themes will have you pondering long after the last page.

However, it’s worth noting the glaring plot holes that can occasionally disrupt the flow.

Some characters left us wanting more depth, too.

With a solid rank in the Kindle Store, this book is undoubtedly worth the read, but be prepared for a few bumps along the way.

If you're ready for an adventure, grab it and enjoy the journey!

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Price history for The Ark on Amazon

H. G. Wells Boxed Set

SCI-FI Boxed Set: 150+.: Space Adventures, Lost Worlds, Dystopian Novels & Post-Apocalyptic Tales: The War of the Worlds, Anthem, Space ... America, A Traveler in Time, The Guardians…
Highlights
Affordable classic sci-fi
Large selection available
Convenient for travel

When it comes to discovering affordable classic sci-fi, we highly recommend diving into this collection available on Kindle Unlimited.

With a wide array of selections, you’ll be transported through time and space without straining your wallet.

Perfect for travel, you can carry an entire universe in your pocket!

However, we did notice some occasional Kindle device errors and limited accessibility options, so be prepared for a few hiccups.

With an impressive 4.3-star rating from 133 reviews, this anthology is worth your time—just be ready to embrace the quirks.

Get ready to explore some timeless narratives that have shaped the genre!

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Price history for H. G. Wells Boxed Set on Amazon

Where the Forest Meets the Stars Sci Fi Books Kindle Unlimited

Where the Forest Meets the Stars
Highlights
Engaging storyline
Richly developed characters
Unique blend of genres

When it comes to grabbing a sci-fi read that stands out, this title is a fantastic choice, despite its occasional slow pacing.

The engaging storyline and richly developed characters draw us in from the first page.

We love that it offers a unique blend of genres, making it perfect for both sci-fi enthusiasts and literary fiction fans alike.

However, if you're after a traditional sci-fi experience, be prepared for a bit more sentimentality than you might expect.

With high ratings and numerous accolades, it's definitely worth checking out on Kindle Unlimited for a captivating read!

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Price history for Where the Forest Meets the Stars on Amazon

Dungeon Diving 204

Dungeon Diving 204
Highlights
High customer rating
Engaging plots
Unlimited device usage

Dive into a vibrant universe of imagination with this sci-fi gem that’s making waves on Kindle Unlimited.

With an impressive rating of 4.9 stars from nearly 900 readers, we’re enchanted by the engaging plots that effortlessly pull you in.

The unlimited device usage means you can hop between your phone, tablet, or e-reader without missing a beat.

While the shorter book length may leave you craving more, the thrilling adventures packed within make up for it.

Just keep in mind the absence of the X-ray feature for deeper insights.

Overall, it’s a delightful read we wholeheartedly recommend for sci-fi fans!

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Price history for Dungeon Diving 204 on Amazon

The Starship In The Stone

The Starship In The Stone
Highlights
Engaging storyline
Unique Arthurian twist
Fast-paced narrative

We’re thrilled to spotlight this intriguing title that effortlessly blends Arthurian legend with the high stakes of space adventure!

With over 2,475 ratings and a solid 4.4-star average, it’s clear readers are hooked on the engaging storyline and fast-paced narrative.

While some minor spelling typos and familiar plot patterns popped up, these quirks don’t overshadow the fun.

Plus, at just 388 pages, it’s a quick read perfect for grabbing in one sitting.

If you’re ready to embark on a stellar journey, this book should be at the top of your Kindle Unlimited list!

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Price history for The Starship In The Stone on Amazon

Spores Sci Fi Books Kindle Unlimited

Spores: A Sci-Fi Horror Novel
Highlights
Exciting storyline
Well written
Great character development

Buckle up, book lovers! This sci-fi gem from Preternatural Press has us hooked with its exciting storyline and great character development.

We appreciate how the narrative pulls you into an intricate world, though be warned—its complex plot and highly scientific terminology might leave casual readers a bit dizzy.

While it doesn’t consistently crank up the intensity, the depth and detail make up for it.

This title, releasing on January 28, 2025, is perfect for those craving a thoughtful read in the science fiction genre.

With a solid 4.4-star rating, it clearly resonates with many, and we can see why!

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Price history for Spores on Amazon

Queen of Roses

Queen of Roses: A Dark Fae Fantasy Romance (Blood of a Fae Book 1)
Highlights
Unique Arthurian retelling
Intriguing characters and plot
Well-written and engaging

We’re thrilled to dive into this unique Arthurian retelling that’s making waves in the Kindle Unlimited universe!

Published by Starwater Press, this gem transports readers to a world of intriguing characters and gripping plots.

At 361 pages, it offers plenty of captivating content, though we must note some slow pacing and occasional dense passages may challenge a few readers.

Still, with a commendable 4.1-star rating and a top spot in Arthurian Fantasy, it's certainly worth your time.

If you’re ready for a fresh spin on classic tales, this book is calling your name—wield your Kindle and embark on this adventure!

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Price history for Queen of Roses on Amazon

Darkspace Renegade

Darkspace Renegade: The Complete Series (G J Ogden Space Opera Sci-Fi Box Sets Book 11)
Highlights
Unlimited simultaneous devices
Text-to-speech enabled
High customer rating

We couldn't resist diving into this upcoming gem from Ogden Media Ltd!

Slated for release on February 18, 2025, this sci-fi adventure is already making waves with a solid 4.3-star rating from early readers.

We love that it allows unlimited simultaneous device usage—perfect for sharing cosmic journeys with friends.

The text-to-speech feature is a nice touch, making it accessible for everyone.

However, keep in mind the file size is a hefty 3.1 MB.

Unfortunately, the X-Ray feature isn't included, so you might want to keep a notebook handy for those intricate plot twists.

In short, this book looks like a must-read for sci-fi enthusiasts on Kindle Unlimited!

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Price history for Darkspace Renegade on Amazon

The Librarian Of Crooked Lane Sci Fi Books Kindle Unlimited

The Librarian of Crooked Lane (The Glass Library Book 1)
Highlights
Engaging world-building
Interesting characters
Fast-paced storytelling

As we dive into this intriguing sci-fi gem, we're struck by its engaging world-building that feels rich and immersive.

The characters spring to life, drawing us in with their unique quirks and motivations.

While the storytelling is generally fast-paced, we do notice occasional slow moments that might trip up some readers seeking constant thrills.

Yet, with 4.4 stars from fellow enthusiasts, it's clear that this book hits the mark for many.

Just keep in mind, it may not cater to everyone’s taste.

If you’re a fan of historical fantasy, this one deserves a spot on your Kindle Unlimited list!

Be sure to also check out the best cozy mysteries on kindle unlimited for more options! Also, here is the price history so you know exactly when to buy!

Price history for The Librarian Of Crooked Lane on Amazon

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