Past Kindle Book Deals but Still Must Read Books!
Looking for must read books you missed the first time around? You’re in the right place. This is where all of our past Kindle book deals live—the ones good enough to click, even if the discount’s gone. Every book here was hand-picked by our team, featured in a daily deal, and still earns a spot on your TBR.
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These Books Earned Our Seal of Approval—Snag Them Before They Vanish (Again)
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959 past books matching Sci-Fi
When a stranded bomber crew boards an abandoned alien ship, survival turns into a descent into something far worse.
The Dark Ship
Horror · Sci-Fi · Hard Sci-Fi
Our take
When a stranded bomber crew boards an abandoned alien ship, survival turns into a descent into something far worse. Captain Jeff Austin leads the last survivors deeper into the vessel in search of answers, only to find a hostile presence and horrors buried at its core. This sci-fi horror pick leans into isolation, pursuit, and the terror of exploring something that was never meant to be found.
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About the book
Captain Jeff Austin and his crew are stranded in the interstellar void after their bomber is destroyed. Their last hope is a giant alien spacecraft floating abandoned in space. But not long after gaining access, the crew’s worst fears are confirmed: they are not alone on board, and soon their lives are under threat from sinister aliens. There seems to be only one way out: Jeff sets off with the last survivors to the distant center of the ship to uncover the dark secrets of its extraterrestrial inhabitants. But nothing can prepare them for the horror that awaits them deep inside The Black Ship. Sci-Fi-Horror for fans of Alien, Event Horizon and Pandorum.
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Answering a distress call in deep space is already a terrible idea, and Contagion wastes no time proving it.
Contagion
Sci-Fi · Horror · Teen + Young Adult
Our take
Answering a distress call in deep space is already a terrible idea, and Contagion wastes no time proving it. What starts as a routine rescue mission turns into a nightmare when the crew arrives to find a distant planet full of corpses and something deadly still lurking in the wreckage. Fast, creepy, and packed with survival tension, this YA sci-fi horror delivers monsters, mystery, and plenty of reasons to keep the lights on.
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About the book
Edgar Award Nominee for Best Young Adult Mystery
Perfect for fans of Madeleine Roux, Jonathan Maberry, and horror films like 28 Days Later and Resident Evil, this pulse-pounding, hair-raising, utterly terrifying novel is the first in a duology from the critically acclaimed author of the Taken trilogy.
After receiving a distress call from a drill team on a distant planet, a skeleton crew is sent into deep space to perform a standard search-and-rescue mission.
When they arrive, they find the planet littered with the remains of the project—including its members’ dead bodies. As they try to piece together what could have possibly decimated an entire project, they discover that some things are best left buried—and some monsters are only too ready to awaken.
ADVANCE PRAISE FOR CONTAGION:
“Gripping, thrilling and terrifying in equal measures, Contagion is the perfect intersection of science fiction and horror—I couldn’t look away.”—Amie Kaufman, New York Times bestselling author of Illuminae and Unearthed
“Few understand the true horror that lies in the empty unknown of space, but Erin Bowman nails it in Contagion. Read this one with the lights on!”—Beth Revis, New York Times bestselling author of the Across the Universe series and Star Wars: Rebel Rising
“Erin Bowman’s Contagion is everything I want in my science fiction: a cast of smart characters on a desperate rescue mission forced to confront an elusive and unstoppable enemy. I absolutely loved this layered and thrilling adventure and can’t wait to dive back into this world again.”—Veronica Rossi, New York Times bestselling author of the Under the Never Sky series
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Going to Europa in search of life already feels risky.
Europa
Horror · Sci-Fi · Space Exploration
Our take
Going to Europa in search of life already feels risky. Discovering something ancient, trapped, and absolutely not friendly makes it much worse. Europa sends a mission beneath the moon’s frozen surface and into a nightmare waiting in the dark, turning scientific discovery into a brutal fight to survive. Cold, claustrophobic, and full of mounting dread, this is space horror built to keep the pressure on.
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About the book
The first mission to Europa—Jupiter's enigmatic moon—has landed, and humanity’s darkest fears are about to awaken.
For years, mankind has speculated that this frozen world harbors a hidden ocean twice the size of all Earth’s oceans combined—an ocean potentially teeming with life.
Driven by this tantalizing mystery, they venture forth to unlock its secrets. But what they discover in the abyssal depths is far beyond anything they could have imagined.
Nearly four hundred million miles from Earth, their search for life has succeeded. But in their triumph, they overlook the most terrifying truth: what they have found is something far older and more horrifying than they ever could have conceived. Something has been trapped in the dark for eons—watching, and waiting, for them.
Now, the crew stands at the threshold of unimaginable terror, realizing too late that Hell, in its purest form, is cold.
EUROPA: A brutal, heart-stopping descent into deep space horror by international bestselling author Greig Beck.
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Finding a new planet to colonize is supposed to feel like humanity finally getting a win.
Dark Sands
Sci-Fi · First Contact · Space Exploration
Our take
Finding a new planet to colonize is supposed to feel like humanity finally getting a win. Then night falls and DARK SANDS makes it very clear that Cahros has other plans. What starts as a hopeful expedition into a seemingly lifeless desert turns into a fight for survival against whatever is hiding beneath all that orange sand. Tense, eerie, and full of creeping danger, this is sci-fi horror that knows barren planets are never actually empty.
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About the book
DARK SANDS is a finalist for the 2025 Aurealis Awards Best Science Fiction Novel - Australia's most prestigious speculative fiction literary award!
Humanity has spent years surveying the depths of space, searching for another planet like Earth.
In Cahros, they might have found one.
Among the first wave of specialists deployed to the planet is Tarlo, a young and optimistic biologist who has spent his life dreaming of adventure among the stars. For all his excitement, he feels a little out of his depth – everyone around him seems so much smarter, stronger, and better equipped to deal with whatever challenges may lie ahead.
The team finally sets down on Cahros, but is surprised to learn that the planet is home only to a barren, lifeless desert. All is quiet.
That is, until night falls.
A nightmarish series of events leave Tarlo and the remaining colonists struggling to survive in a world that is so much more than a benign sea of orange. Here on Cahros, nothing is as it seems, and deep within these endless deserts lie untold, deadly secrets.
There’s something out there… in the sands…
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Fast, gruesome, and built for readers who like their sci-fi with a serious body count.
2389
Post-Apocalyptic · Horror · Sci-Fi
Our take
A luxury amusement park on the moon sounds fun right up until it sends out a distress call and then goes completely silent. 2389 takes that already terrible setup and runs with it, sending a team into Grand Galaxies to find out what went wrong and uncovering something far worse than a broken ride. Fast, gruesome, and built for readers who like their sci-fi with a serious body count.
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About the book
The happiest place in the galaxy just sent out a distress call...
Grand Galaxies is the most expensive amusement park ever created, built on the surface of the moon. For decades, rich families and honeymooning couples have gone there to have the time of their lives and no one has ever returned disappointed...
But communication with the moon has been lost.
Someone needs to go up there and see what’s wrong.
A unique and terrifying experience by a master of the genre. Sci-fi meets horror head on with the terrifying 2389. Grab your copy now and experience the fear for yourself.
"Iain Rob Wright scares the hell out of me." - J.A.Konrath
"Iain Rob Wright is sick and twisted!" - David Moody.
"Cuddle up to this novel and it might rip your throat out. A fun, thrilling read!" David T. Wilbanks - Co-author of Dead Earth: The Vengeance Road
"One of the BEST horror books I have read in YEARS!" - Eric S. Brown, author of Last Stand in a Dead Land.
"Iain Rob Wright brings true excitement to the horror genre, with wholly original stories and characters to route for." - Ryan C Thomas, author of Hissers, Rating's Game, and Origin of Pain.
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Ideal for readers looking for space opera that combines artificial intelligence, cosmic horror, scientific ambition, and an autistic protagonist.
The Outside
Sci-Fi · Hard Sci-Fi · Space Exploration
Our take
Autistic scientist Yasira Shien develops an energy drive that could change humanity’s future, but its activation warps reality and destroys a space station. The AI Gods ruling the galaxy offer to spare her if she helps them track down her vanished mentor. Ideal for readers looking for space opera that combines artificial intelligence, cosmic horror, scientific ambition, and an autistic protagonist.
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About the book
Humanity’s super-intelligent AI Gods brutally punish breaches in reality, as one young scientist discovers, in this intense and brilliant space opera.
Autistic scientist Yasira Shien has developed a radical new energy drive that could change the future of humanity. But when she activates it, reality warps, destroying the space station and everyone aboard. The AI Gods who rule the galaxy declare her work heretical, and Yasira is abducted by their agents. Instead of simply executing her, they offer mercy – if she’ll help them hunt down a bigger target: her own mysterious, vanished mentor. With her homeworld’s fate in the balance, Yasira must choose who to trust: the gods and their ruthless post-human angels, or the rebel scientist whose unorthodox mathematics could turn her world inside out.
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Getting called back to space after your career already imploded is bad enough.
The Last Astronaut
Sci-Fi · First Contact · Hard Sci-Fi · Space Exploration
Our take
Getting called back to space after your career already imploded is bad enough. Finding out the alien object heading toward Earth has no interest in playing nice makes it so much worse. The Last Astronaut throws a disgraced former NASA commander into a tense first-contact mission that quickly turns into a fight for survival. Fast, eerie, and packed with dread, this is sci-fi horror with real momentum.
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About the book
Shortlisted for the Arthur C. Clarke Award 2020!
"A terrifying tour de force." --James Rollins
"Readers will be riveted." --Publishers Weekly (starred review)
Sally Jansen was NASA's leading astronaut, until a mission to Mars ended in disaster. Haunted by her failure, she lives in quiet anonymity, convinced her days in space are over.
She's wrong.
A large alien object has entered the solar system on a straight course toward Earth. It has made no attempt to communicate. Out of time and out of options, NASA turns to Jansen.
But as the object reveals its secrets, Jansen and her crew find themselves in a desperate struggle for survival -- against the cold vacuum of space, and something far, far worse...
"Breathless, compulsive reading." --Christopher Golden
"A suspenseful, fast-paced story of first contact." --Kirkus
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Making first contact was supposed to mean discovery, not absolute disaster.
Xeno
Horror · Sci-Fi · Cosmic Horror · Creature Feature · Eldritch Horror · First Contact
Our take
Making first contact was supposed to mean discovery, not absolute disaster. Xeno traps a tiny crew aboard a colony ship with an ancient alien force that should have stayed lost in space, turning a routine journey into a full-blown nightmare. Dark, brutal, and built on rising dread, this is space horror that goes straight for the throat.
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About the book
A terrifying descent into space horror.
Sometimes in space you wake to a nightmare.
The huge spaceship the Xeno is en route to a new world light years from Earth, its payload of more than 50,000 cryogenically frozen colonists watched over by a supercomputer and a skeleton crew of only a dozen people.
When the ship comes into contact with a seemingly inert alien artefact drifting in space, the crew believes they've made a momentous discovery for all humankind. They’re unaware it’s the eve of true horror.
Soon it becomes clear the crew have unwittingly woken an evil so ancient and so powerful it threatens not only the ship and its slumbering passengers, but the future of the human race itself.
Recommended for mature readers due to graphic language, violence and sexual content.
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Saving humanity sounds noble right up until someone plants a bomb on the ship.
The Deep Sky
Post-Apocalyptic · Sci-Fi · Space Exploration · Speculative Fiction
Our take
Saving humanity sounds noble right up until someone plants a bomb on the ship. The Deep Sky follows a generation ship mission carrying Earth’s last hope, where one deadly explosion leaves the crew terrified, suspicious, and increasingly willing to turn on each other. Asuka, the only surviving witness, is stuck at the center of the chaos in this tense sci-fi thriller that blends space survival, buried secrets, and the kind of pressure that makes trust feel almost fictional.
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About the book
Yume Kitasei's The Deep Sky is an enthralling sci fi thriller debut about a mission into deep space that begins with a lethal explosion that leaves the survivors questioning the loyalty of the crew.
They left Earth to save humanity. They’ll have to save themselves first.
It is the eve of Earth’s environmental collapse. A single ship carries humanity’s last hope: eighty elite graduates of a competitive program, who will give birth to a generation of children in deep space. But halfway to a distant but livable planet, a lethal bomb kills three of the crew and knocks The Phoenix off course. Asuka, the only surviving witness, is an immediate suspect.
As the mystery unfolds on the ship, poignant flashbacks reveal how Asuka came to be picked for the mission. Despite struggling through training back on Earth, she was chosen to represent Japan, a country she only partly knows as a half-Japanese girl raised in America. But estranged from her mother back home, The Phoenix is all she has left.
With the crew turning on each other, Asuka is determined to find the culprit before they all lose faith in the mission—or worse, the bomber strikes again.
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Good for readers who like medical thrillers, parasite horror, and near-future science fiction with outbreak stakes.
Symbiont
Dystopian · Thriller · Genetic Engineering
Our take
In a world where tapeworms were designed to cure diseases, they instead turn on their hosts, creating a ravenous horde. Sal and her companions must uncover the tapeworms' sinister plan and find a way to stop them before it's too late. Symbiont has a 4.3-star rating from more than 1,100 Amazon reviewers. Good for readers who like medical thrillers, parasite horror, and near-future science fiction with outbreak stakes.
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About the book
From New York Times bestselling author Mira Grant comes the second book in the terrifying Parasitology series.
The SymboGen-designed tapeworms were created to relieve humanity of disease and sickness. But the implants in the majority of the world's population began attacking their hosts, turning them into a ravenous horde.
Now those who do not appear to be afflicted are being gathered for quarantine as panic spreads, but Sal and her companions must discover how the tapeworms are taking over their hosts, what their eventual goal is, and how they can be stopped.
"A riveting near-future medical thriller that reads like the genetically-engineered love child of Robin Cook and Michael Crichton." —John Joseph Adams on Parasite
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Earth’s leading scientists travel to Xica, an alien world with an advanced civilization, where their discoveries reveal wonders that could threaten humanity’s survival, with a 3.9-star average from…
Life Form
Sci-Fi · Alien Invasion · First Contact · Space Exploration
Our take
Earth’s leading scientists travel to Xica, an alien world with an advanced civilization, where their discoveries reveal wonders that could threaten humanity’s survival, with a 3.9-star average from more than 30 Goodreads ratings. Ideal for science fiction readers interested in alien civilizations, planetary exploration, and dangerous first contact.
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About the book
Humanity makes first—and possibly last—contact with an alien species in this sci-fi adventure from the New York Times–bestselling author of the Humanx Commonwealth series.
Earth's most elite team of scientists has made an astonishing discovery. Far from our solar system is the life-sustaining planet Xica, home of an advanced intelligent species who have created a human-like civilization.
Invited to visit, the scientists explore a world of miraculous wonders that defies the very laws of nature as they know it. But Xica's secrets may threaten not only their lives but the lives of everyone on Earth . . .
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It fits sci-fi readers who want mech warfare, high-stakes first contact, and countdown-driven tension.
Strike Range
Sci-Fi · Cyberpunk
Our take
A looming alien arrival cuts humanity’s timeline in half and forces one pilot into a brutal first-contact decision with millions of lives at stake. In Strike Range, David Wayne must weigh defense, political pressure, and a dying intelligence reaching out through a neural link before Valis becomes the center of catastrophe. It fits sci-fi readers who want mech warfare, high-stakes first contact, and countdown-driven tension.
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About the book
Eight months. That's all the warning they got.
David Wayne thought the math was wrong when Sigma-9 flagged two hundred forty-seven massive contacts inbound to Valis. The sensors don't lie—something vast and alien is coming, broadcasting a signal into the void that's been unanswered for years.
Dr. Freedman has a theoretical weapon. Corporate titan Ionis Vael wants to weaponize the entity itself. Xenobiologist Elias Thorne has two million followers convinced humanity is about to start an interstellar war with a species that just wants to talk.
Through his mech's neural interface, David makes contact with the entity's failing consciousness.
It's desperate. Dying.
When it accelerates, cutting their preparation time in half, David faces an impossible choice: finish the defensive array with thirty units instead of forty, or launch a strike mission to intercept the entity before it reaches Valis.
One neural link. One dying alien intelligence. And four weeks to get it right.
Can David bridge the gap between species before time runs out? Or will the wrong answer condemn thirty million people?
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