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
Best for readers who like funny, thoughtful sci-fi with friendship, road-trip chaos, and simulation theory.
When We Were Real
Sci-Fi
Our take
A #1 best seller called “an addictive thriller packed with winning characters and big, brilliant ideas” by Lev Grossman, When We Were Real follows two longtime friends on one last bus tour through the glitches of their simulated world, with a 4.2-star rating from more than 200 Amazon reviewers. Best for readers who like funny, thoughtful sci-fi with friendship, road-trip chaos, and simulation theory.
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About the book
Finalist for the Nebula Award for Best Novel
From multiple award-winning author Daryl Gregory comes a madcap adventure following two friends on a cross-country bus tour through the mind-boggling glitches in their simulated world as they grapple with love, family, secrets, and the very nature of reality in a simulation.
JP and Dulin have been the best of friends for decades. When JP finds out his cancer has aggressively returned, Dulin decides it’s the perfect time for one last adventure: a week-long bus tour of North America’s Impossibles, the physics-defying glitches and geographic miracles that started cropping up seven years earlier—right after the Announcement that revealed our world to be merely a digital simulacrum. The outing, courtesy of Canterbury Trails Tours, promises the trip of a (not completely real) lifetime in a (not completely deluxe) coach.
Their fellow passengers are 21st-century pilgrims, each of them on the tour for their own reasons. There’s a nun hunting for an absent God, a pregnant influencer determined to make her child too famous to be deleted, a crew of horny octogenarians living each day like it’s their last, and a professor on the run from leather-clad sociopaths who take The Matrix as scripture. Each stop on this trip is stranger than the last—a Tunnel outside of time, a zero gravity Geyser, the compound of motivational-speaking avatar—with everyone barreling toward the tour’s iconic final stop Ghost City, where unbeknownst to our travelers the answer to who is running the simulation may await.
When We Were Real is “an addictive thriller packed with winning characters and big, brilliant ideas” (Lev Grossman, New York Times bestselling author of The Bright Sword and The Magicians trilogy) and an exploration of what really matters, even in an artificial world.
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Good for readers who like thoughtful sci-fi about found family, AI, and interplanetary conflict.
Sunward
Sci-Fi · LGBTQIA+ · Space Colonization · Space Opera
Our take
A 2026 Philip K. Dick Award finalist by National Book Award-winning author William Alexander, Sunward follows planetary courier Tova Lir as she mentors teenage AI and races across the solar system after a derelict ship and assassin put her found family in danger, with a 4.3-star rating from more than 200 Amazon reviewers. Good for readers who like thoughtful sci-fi about found family, AI, and interplanetary conflict.
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About the book
A 2026 Philip K. Dick Award Finalist
A debut science fiction novel by National Book Award–winning writer William Alexander, this story of found family follows a planetary courier training adolescent androids in a solar system grappling with interplanetary conflict after a devastating explosion on Earth’s moon.
Captain Tova Lir chose a life as a courier rather than get involved in her family’s illustrious business in politics. Set in humanity’s far future, hiring a planetary courier is essential for delivering private messages across the stars.
Encouraged by friends, Tova begins mentoring baby bots, juvenile AI who are developmentally in their teens, and trains them how to interact within society essentially becoming their foster mom. Her latest charge, Agatha Panza von Sparkles, named herself on their first run from Luna to Phoebe station. But on their return, they encounter a derelict spaceship and a lurking assassin, igniting a thrilling chase across the solar system.
Tova and Agatha’s daring actions leave Agatha’s mind vulnerable, relying on Tova’s former AI pupils for help. As Tova starts gathering her scattered family around her, she is chased through the solar system by forces who want her captured and her family erased. This debut science fiction novel by National Book Award–winning author William Alexander is a must-read for fans of Becky Chambers and Ursula K. Le Guin. Lovers of poignant science fiction, where the bonds of found family, the evolution of AI, and the building distrust of centuries of bias, come together in this visionary look at humanity’s future.
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Good for readers who want extinction-level sci-fi, alien mysteries, conspiracy threads, and high-stakes discovery.
Final Contact
Sci-Fi · Alien Invasion · First Contact · Space Colonization
Our take
Two complete sci-fi series come together in Final Contact, where Earth faces extinction through converging natural disasters, mass disappearances, a changed Mars mission, and ancient artifacts pointing to alien contact. As separate trails reveal hidden forces and long-buried secrets, humanity may have to confront what has already been here, with a 4.5-star rating from more than 190 Amazon reviewers. Good for readers who want extinction-level sci-fi, alien mysteries, conspiracy threads, and high-stakes discovery.
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About the book
Two complete series from the best-selling duo Jasper T. Scott and Nathan Hystad are together for the first time in a single volume! With over 15,000 ratings and 2,000 pages of gripping science fiction, you can’t miss this epic collection.
Included within:
Final Days (The Complete Series, Books 1-3)
The countdown to the end of the world has begun.
A mysterious convergence of natural disasters threatens to destroy life as we know it, and people across the United States are going missing. With no one left to investigate, Special Agent Kendra Baker takes the case, trying to solve the disappearances before she’s out of time.
Among those abducted is Valeria Miller, the daughter of ex-Marine Corporal Andrew Miller, and he’ll stop at nothing to find her.
With the help of an unstable conspiracy theorist, they find themselves on the trail of a reclusive billionaire with all the answers.
From Beyond (The Complete Series, Books 1-3)
It was only a matter of time before the truth was revealed....
Commander David Bryce is scheduled to lead a routine re-supply run to the fledgling colony on Mars. Without warning, he’s taken away by government agents and told the mission parameters have changed.
They’ve discovered something. And it’s drifting closer to Earth.
Atlas Donovan tracks an ancient artifact to Lake Como, Italy. After the recent news, Atlas is more drawn to the trail than ever. He continues his search, determined to uncover the significance of the strange markings, and more importantly, where the artifacts really came from.
As both Atlas and David draw near to their objectives, they realize a secret organization is working against them; a clandestine force with so much influence, they seem impossible to oppose.
Are we alone?
No, and they’ve been here before...
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Best for readers who like first-contact science fiction, mysterious alien technology, and ordinary people thrust into interstellar danger.
Unwanted Starship
Sci-Fi · Space Exploration · Space Opera
Our take
Ethan Cross expects an ordinary night shift until an impossible machine appears behind his plant. After he touches it, a countdown begins and his life is pulled toward the stars, with a 4.4-star rating from more than 4,500 Amazon reviewers. Best for readers who like first-contact science fiction, mysterious alien technology, and ordinary people thrust into interstellar danger.
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About the book
Ethan Cross expected second shift at Meridian Industrial to end the way it always did—oil-stained hands, clock out, go home.
Then something impossible shows up behind the plant. It isn’t on any schedule. It isn’t on any radar. And it definitely isn’t human.
Ethan makes one mistake, he gets close.
That’s when his ordinary life ends. Whatever is sitting in the dark isn’t debris or a prank—it’s a machine built for a purpose, and it didn’t arrive by accident. Ethan doesn’t know what it wants, or who it belongs to, but he knows this much: the moment he touched it, a countdown started.
Some doors open to freedom. Some open to trouble.
This one opens to the stars.
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Good for readers who like hard science fiction about evolution, epidemiology, government cover-ups, and human survival.
Darwin’s Radio
Sci-Fi · Genetic Engineering · Hard Sci-Fi
Our take
Nebula Award winner and Hugo Award finalist Darwin’s Radio is a Hugo Award nominee about a prehistoric disease reawakening in human DNA, as scientists race to solve the mystery behind a deadly epidemic targeting pregnant women, with a 4.2-star rating from more than 1,100 Amazon reviewers. Good for readers who like hard science fiction about evolution, epidemiology, government cover-ups, and human survival.
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About the book
HUGO AWARD FINALIST • “WOW! What a splendid (scary) notion: a human upgrade! What a superb plot! Darwin's Radio is bloody damned good.”—Anne McCaffrey
“Virus hunter” Christopher Dicken is a man on a mission, following a trail of rumors, government cover-ups, and dead bodies around the globe in search of a mysterious disease that strikes only pregnant women and invariably results in miscarriage. But when Dicken finds what he’s looking for, the answer proves to be stranger—and far deadlier—than he ever could have imagined. Something that has slept in human DNA for millions of years is waking up.
Molecular biologist Kaye Lang has spent her career tracing ancient retroviruses in the human genome. She believes these microscopic fossils can come to life again. But when Dicken’s discovery becomes public, Lang’s theory suddenly turns to chilling fact. As the outbreak of this terrifying disease threatens to become a deadly epidemic, Dicken and Lang must race against time to assemble the pieces of a puzzle only they are equipped to solve—an evolutionary puzzle that will determine the future of the human race . . . if a future exists at all.
Praise for Darwin’s Radio
“Bear is one of our very best, and most innovative, speculative writers.”—New York Daily News
“Superb . . . Bear's novel is frighteningly believable with a lot of clearly explained hard science, but the personal struggles of the well-realized characters keep everything on a human level.”—Focus
“Bear is a writer of passionate vision.”—Locus
“Darwin’s Radio scores a high rating on the thrill monitor.”—Birmingham Post (England)
“Absorbing and ingenious.”—Kirkus Reviews
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Good for readers who want dark sci-fi about infection, survival, and forced evolution.
Clay’s Ark
Dystopian · Thriller · Genetic Engineering · Suspense
Our take
Blake Maslin and his teenage twin daughters are ambushed in an alternate America and taken to an isolated compound where a contagious alien disease has transformed its carriers into powerful, dangerous outcasts. Clay’s Ark follows their fight to escape, warn the world, or accept a new reality that could change humanity’s future, with a 4.4-star rating from more than 1,000 Amazon reviewers. Good for readers who want dark sci-fi about infection, survival, and forced evolution.
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About the book
From the acclaimed author of the Earthseed series, two immortals chase each other across continents and centuries, binding their fates together and changing the destiny of the human race.
Blake Maslin is traveling with his teenage twin daughters through an alternate America marked by volatile class warfare when their car is ambushed. Their attackers appear sickly yet possess inhuman strength, and they transport Blake's family to an isolated compound. There, the three captives discover that the compound's residents have a highly contagious alien disease that has mutated their DNA to make them powerful, dangerous, and compelled to infect others.
If Blake and his daughters do not escape, they will be infected with a virus that will either kill them outright or transform them into outcasts whose very existence is a threat to the world around them.
In the following hours, Blake and his daughters must make a vital choice: risk everything to escape and warn the rest of the world, or accept their new reality—as well as the uncertain fate of the human race.
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Good for readers who like Arthurian legend, starship adventure, dragons, and reluctant heroes learning to lead.
Here Be Dragons
Sci-Fi · Military Sci-Fi · Space Opera
Our take
Thomas finds Excalibur beneath a Welsh lake and must lead his crew through enemy territory while battling the Draconite, discovering his role as captain of a legendary starship, with a 4.5-star rating from more than 4,800 Amazon reviewers. Good for readers who like Arthurian legend, starship adventure, dragons, and reluctant heroes learning to lead.
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About the book
Thomas never expected to find Excalibur stuck beneath a Welsh lake. He never asked to be a hero. And he certainly never imagined standing between a tyrant and the fate of a galaxy.
Destiny doesn’t wait for permission.
From the mystical world of Avalyeth, Thomas’ journey will lead him and his growing crew into the heart of enemy territory, the halls of ancient dragons, and the path of knights who remember a time when hope still burned bright. Hunted by the Draconite and haunted by the past, they’ll need to risk everything to outmaneuver and overcome those who would see them destroyed.
As new alliances form and old rivalries re-ignite, Thomas must prove he’s more than just the captain of a legendary starship—he must become the leader others believe him to be.
Even if he still isn’t sure he believes it himself.
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Good for readers who like epic military sci-fi, space opera, and civilization-level survival stakes.
The Cruel Stars
Sci-Fi · Space Opera
Our take
Called “jarring, engrossing” by Publishers Weekly, After centuries of peace, the genocidal Sturm returns to attack humanity. Five unlikely heroes - a commander, a condemned soldier, a princess, an outlaw, and an admiral - must unite to save civilization, with a 4.4-star rating from more than 2,400 Amazon reviewers. Good for readers who like epic military sci-fi, space opera, and civilization-level survival stakes.
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About the book
In this epic sci-fi adventure for fans of The Expanse and Battlestar Galactica, five intrepid heroes must unite to save civilization after a long-dormant enemy awakens and strikes a devastating blow
“This jarring, engrossing story of a species-wide fight for survival is recommended for all science fiction readers.”—Publishers Weekly (starred review)
The galaxy was once terrorized by the Sturm, a group of “species purists” intent on destroying any human with genetic or cybernetic enhancements. Fashioning themselves as the one true “Human Republic,” the Sturm cut a bloody swath across the stars, killing billions before finally being defeated and driven into the far reaches of Dark Space. Centuries of peace bred complacency. Everyone believed the Sturm had died out in the Dark. They were wrong.
The enemy has returned and, with a brutal and decisive attack, knocks out almost all of humanity’s defenses. Now on the brink of annihilation, humankind’s only hope is a few brave souls who survived the initial attack: Commander Lucinda Hardy, thrust into uncertain command of the Royal Armadalen Navy’s only surviving warship. Booker3, a soldier of Earth, sentenced to die for treason, whose time on death row is cut short when the Sturm attack his prison compound. Princess Alessia, a young royal of the Montanblanc Corporation, forced to flee when her home planet is overrun and her entire family executed. Sephina L’trel, the leader of an outlaw band who must call on all of her criminal skills to resist the invasion. And, finally, Admiral Frazer McLennan, the infamous hero of the first war with the Sturm hundreds of years ago, who hopes to rout his old foes once and for all—or die trying.
These five flawed, reluctant heroes must band together to prevail against a relentless enemy and near-impossible odds. For if they fail, the future itself is doomed.
“Frenetic action viewed in a black fun-house mirror.”—Kirkus Reviews
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Good for readers who want dystopian science fiction about debt, bodily autonomy, consent, abuse, and power.
Docile
LGBTQIA+ · Sci-Fi
Our take
A young man sells himself to pay off his family's debts, but refuses to take the drug that makes him compliant, with a 4.1-star rating from more than 600 Amazon reviewers. Good for readers who want dystopian science fiction about debt, bodily autonomy, consent, abuse, and power.
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About the book
K. M. Szpara's Docile is a science fiction parable about love and sex, wealth and debt, abuse and power, a challenging tour de force that at turns seduces and startles.
There is no consent under capitalism.
To be a Docile is to be kept, body and soul, for the uses of the owner of your contract. To be a Docile is to forget, to disappear, to hide inside your body from the horrors of your service. To be a Docile is to sell yourself to pay your parents' debts and buy your children's future.
Elisha Wilder's family has been ruined by debt, handed down to them from previous generations. His mother never recovered from the Dociline she took during her term as a Docile, so when Elisha decides to try and erase the family's debt himself, he swears he will never take the drug that took his mother from him.
Too bad his contract has been purchased by Alexander Bishop III, whose ultra-rich family is the brains (and money) behind Dociline and the entire Office of Debt Resolution. When Elisha refuses Dociline, Alex refuses to believe that his family's crowning achievement could have any negative side effects—and is determined to turn Elisha into the perfect Docile without it.
Content warning: Docile contains forthright depictions and discussions of rape and sexual abuse.
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With a 4.6-star rating from more than 100 Amazon reviewers, it’s for readers who like YA space opera, found family, identity mysteries, and time-bending threats.
Lily Starling and the Voyage of the Salamander
Teen + Young Adult · Sci-Fi · Space Opera
Our take
Triple Gold Winner at the 2026 Spring BookFest Awards, Lily Starling and the Voyage of the Salamander follows a girl with no memory of her past as a starship crew draws her into a mission against the psionic Krythar. With a 4.6-star rating from more than 100 Amazon reviewers, it’s for readers who like YA space opera, found family, identity mysteries, and time-bending threats.
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About the book
Triple Gold Winner — 2026 Spring BookFest Awards
First Place: Science Fiction Space Opera, YA Science Fiction, LGBTQ+ Science Fiction
New Edition — Book One in the Award-Winning YA Sci-Fi Series
Lily Starling is alone in a city she barely recognizes, with no memory of her past—only a metal tag bearing her name and an instinct for survival. When a Union starship crew claims she belongs with them, she's pulled centuries beyond her own time and into a desperate mission against the psionic Krythar.
Aboard the starship Salamander, Lily is drawn into a found family of misfit officers, warriors, and exiles. Together, they uncover mysteries hidden among the stars: an ancient memory seed carrying the voices of the dead—and a weapon capable of unraveling time itself.
But when Lily faces her greatest fear, she must choose—confront the truth of her past, or risk losing everything she's come to care about.
A lyrical, fast-paced space opera about identity, connection, and courage at the edge of the unknown.
Perfect for fans of Becky Chambers, with the cinematic scope of Mass Effect and the found-family heart of Firefly and Red Rising.
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For readers who like military science fiction with undercover missions, alien occupation, and resistance warfare.
Blackcollar
Sci-Fi · Alien Invasion · Genetic Engineering · Space Opera
Our take
A resistance fighter infiltrates an alien-controlled government, seeking legendary guerrilla warriors to overthrow the invaders. In Blackcollar, Allen Caine’s mission depends on finding Plinry’s elusive blackcollars before the operation collapses, with a 4.2-star rating from more than 400 Amazon reviewers. For readers who like military science fiction with undercover missions, alien occupation, and resistance warfare.
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About the book
A genetically enhanced fighting force may be humanity's only hope in this novel by the #1 New York Times–bestselling author of Star Wars: Thrawn.
Decades after a successful invasion of Earth and the Terran Democratic Empire by the Ryqril—hostile, leathery-skinned aliens—resistance fighter Allen Caine is training for an undercover mission. He will assume the identity of an aide to the senate—part of the government that colludes with the invaders. But when the mission begins earlier than planned, Caine finds himself stuck on the off-planet outpost of Plinry with no idea of what awaits. He's responsible for the most important mission undertaken by the resistance in twenty years, and when the operation goes awry, Caine's only hope is to locate Plinry's so-called blackcollars—the elusive, martial arts–trained guerilla force whose wartime resistance efforts are legendary. With his life and the freedom of everyone in the TDE on the line, Caine's success will depend on whether or not he can find them. . . .
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Good for readers who like military sci-fi, desperate alliances, and pilots learning under fire.
Sagitta
Sci-Fi · First Contact · Military Sci-Fi
Our take
When an experimental faster-than-light test strands the starship Sagitta in unknown space, young pilot Morgan Greenfield is pulled into a war between a dying alien empire and the annihilating Ta’Krell. Sagitta: First Contact begins a character-driven space opera series about first contact, starfighter combat, and survival, with a 4.4-star rating from more than 100 Amazon reviewers. Good for readers who like military sci-fi, desperate alliances, and pilots learning under fire.
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About the book
A dying alien empire.
Humanity’s first leap beyond the stars.
A war neither side is ready to fight alone.
The Maurian Empire is on the brink of extinction.
Outgunned and outnumbered, Fleet Commander Mog leads the last surviving forces of his people against the relentless Ta’Krell—an enemy bent on total annihilation. With every battle lost, Mog is running out of options…and hope.
Light-years away, humanity is about to stumble onto the galactic stage.
When an experimental faster-than-light test goes catastrophically wrong, the starship Sagitta is hurled deep into unknown space. Among its crew is Morgan Greenfield, a young pilot with no combat experience and no idea that his life is about to change forever.
As first contact turns into open war, two perspectives collide: an alien commander fighting to save his species, and a young human pilot forced to grow up fast in the cockpit of humanity’s most advanced starfighter.
Can an alliance forged in desperation stop a war that has already claimed entire worlds?
Sagitta is the first book in the StarFighter series—a character-driven space opera saga of first contact, starfighter combat, and survival against impossible odds.
Recommended for fans of Ender’s Game, Skyward, and Red Rising.
The StarFighter series continues with Seeker: Beyond Human, where the war reaches Earth.
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