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.
No filler. No bots. Just actually good books at prices that might still be suspiciously low.
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Didn’t grab it when you should have? These past picks are still worth your time.
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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
Isaac Asimov’s The Gods Themselves—winner of the Hugo, Nebula, and Locus Awards—delivers a bold, mind-bending vision of humanity’s future.
The Gods Themselves: A Novel
Sci-Fi · First Contact · Space Opera
Our take
Isaac Asimov’s The Gods Themselves—winner of the Hugo, Nebula, and Locus Awards—delivers a bold, mind-bending vision of humanity’s future. Blending hard science with alien intrigue, this classic examines the peril of unchecked progress. With 4.4 out of 5 stars on Amazon, it’s a masterwork of speculative fiction you won’t want to miss.
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About the book
In the twenty-second century, humanity thinks it’s struck gold: limitless energy from a mysterious exchange with a parallel universe. No fuel costs. No shortages. Just endless power. Too bad it’s a ticking time bomb.
Dr. Frederick Hallam basks in fame as the face of the discovery, while obscure scientist Peter Lamont realizes the truth—Earth’s Sun is being slowly poisoned. Across the divide, alien beings also see doom looming, but their pleas for change go unheard.
Meanwhile, on the Moon, Selene Lindstrom, a lunar-born intuitionist, senses what no equations can prove: annihilation is closer than anyone admits. If no one listens, the cost of “free” energy is planetary extinction.
Three worlds. One failing star. Will truth break through before everything burns out?
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A good pick for readers who like character-focused space opera, found-family crews, military science fiction, mysteries, and threats unfolding across a larger series.
The Ghosts of Trappist
LGBTQIA+ · Sci-Fi
Our take
As Zuma’s Ghost prepares for another Boarding Games run, Sapphi Zika is struggling with strange pleas for help in the Verge while missing freighters and a growing threat around Trappist put the NeoG on alert. It has a 4.1-star average from more than 400 Goodreads ratings. A good pick for readers who like character-focused space opera, found-family crews, military science fiction, mysteries, and threats unfolding across a larger series.
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About the book
“A rollicking space adventure” (Locus), military sci-fi meets found family space opera when the crew of Zuma’s Ghost find themselves under attack, shocking truths are about to be exposed, and the NeoG--the Coast Guard in space--is once again called to action!
Ensign Nell “Sapphi” Zika has been working hard to get past her trauma, but the unnerving pleas for help she’s hearing in the Verge and the song she can’t get out of her head are making that increasingly difficult. As Zuma’s Ghost gears up for a final run at the Boarding Games, their expert hacker is feeling anything but confident. Plus, her chief’s robot dog, Doge, is acting weird—a computer problem she can’t find an answer to—and the increasing number of missing freighters is putting everyone living on or stationed around Trappist on edge.
It doesn’t help the NeoG’s mission that Dread Treasure is sidelined from competing in the Boarding Games, and Commander D’Arcy Montaglione is stuck on the front lines of the mystery of the missing ships while also stuck in his own head. Never good at trusting people to begin with, he’s struggling to piece together his new crew in the aftermath of a great betrayal, knowing this may be his final chance at command. The last thing he wants to do is prove his enemies right and end up getting shoved behind a desk and forgotten. The easy answer to missing ships is pirates, but D’Arcy soon realizes the easiest answer is rarely the right one out in the vacuum of space. What’s worse is that the actual pirates are scared of something out beyond the asteroid belt. Something that’s been taking their ships too…
As the unknowns multiply and one of their mysterious enemies escalates by launching an attack on the NeoG itself, the Interceptor crews must brave both cyber and outer space to hunt down their foes, but no one is prepared for the truth that is revealed or the way it will shake the foundations of everything they believe about the universe.
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When Neanderthal physicist Ponter Boddit accidentally crosses into our universe, he’s thrust into a world of isolation and wonder.
Hominids
LGBTQIA+ · Sci-Fi
Our take
When Neanderthal physicist Ponter Boddit accidentally crosses into our universe, he’s thrust into a world of isolation and wonder. As he forms a bond with geneticist Mary Vaughan, his partner in his world faces trial and peril. Their journeys reveal a fragile connection between two species—one that could unite or destroy them both.
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About the book
Two worlds collide. One Neanderthal’s journey could reshape humanity.
During a daring experiment deep in a Canadian mine, Neanderthal physicist Ponter Boddit accidentally crosses into our universe. Wounded and confused, he becomes a captive—studied as a relic, but slowly recognized as a scientist. Befriended by a compassionate geneticist, Mary Vaughan, Ponter finds hope in their bond, even as he grapples with the alien strangeness of modern humanity.
Back in his world, Ponter’s partner, Adikor Huld, faces suspicion and a murder trial after Ponter’s mysterious disappearance. With time running out, both must navigate danger and distrust to restore the balance between their universes.
As humans and Neanderthals struggle with conflict and connection, their contact sparks profound questions about survival, identity, and the possibilities of shared growth—or destruction.
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Best for readers who like philosophical science fiction about alien contact, survival, identity, and the future of humanity.
Adulthood Rites
Sci-Fi · Dystopian · Genetic Engineering · Speculative Fiction
Our take
Adulthood Rites follows Akin, the first true human-alien hybrid born after nuclear war nearly destroys humankind and the Oankali save the survivors at a cost. As humanity resists a forced future of genetic merging, Akin must reconcile his divided heritage and decide what both species may become, with a 4.4-star rating from more than 2,900 Amazon reviewers. Best for readers who like philosophical science fiction about alien contact, survival, identity, and the future of humanity.
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About the book
From the award-winning author of Parable of the Sower: After the near-extinction of the human race, one young man with extraordinary gifts will reveal whether the human race can learn from its past and rebuild their future ... or is doomed to self-destruction.
In the future, nuclear war has destroyed nearly all humankind. An alien race intervenes, saving the small group of survivors from certain death. But their salvation comes at a cost.The Oankali are able to read and mutate genetic code, and they use these skills for their own survival, interbreeding with new species to constantly adapt and evolve. They value the intelligence they see in humankind but also know that the species—rigidly bound to destructive social hierarchies—is destined for failure. They are determined that the only way forward is for the two races to produce a new hybrid species—and they will not tolerate rebellion.
Akin looks like an ordinary human child. But as the first true human-alien hybrid, he is born understanding language, then starts to form sentences at two months old. He can see at a molecular level and kill with a touch. More powerful than any human or Oankali, he will be the architect of both races' future. But before he can carry this new species into the stars, Akin must reconcile with his own heritage in a world already torn in two.
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Starting over on a new planet sounds great until the planet is paying attention.
Semiosis: A Novel
Sci-Fi · Hard Sci-Fi · Space Colonization · Speculative Fiction
Our take
Starting over on a new planet sounds great until the planet is paying attention. Semiosis follows a colony of humans trying to survive, adapt, and communicate with a sentient alien species that may be far more powerful than they realize. Thoughtful, strange, and deeply human, this first contact story delivers big ideas, sharp worldbuilding, and the kind of sci-fi that cares just as much about people as it does the unknown.
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About the book
Human survival on another planet hinges on a bizarre alliance in this character-driven debut science fiction novel of first contact.
"Combines the world-building of Avatar with the alien wonder of Arrival, and the sheer humanity of Atwood. An essential work for our time." —Stephen Baxter, award-winning author of The Time Ships
Colonists from Earth wanted the perfect home, but they'll have to survive on the one they found. They don't realize another life-form watches . . . and waits . . .
Can humans learn how to communicate with the planet's sentient species and forge an alliance to prove that humans are more than mere tools?
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The Border turns an alien invasion into full-scale apocalypse, then makes it even worse.
The Border
Sci-Fi · Alien Invasion · First Contact
Our take
The Border turns an alien invasion into full-scale apocalypse, then makes it even worse. Earth is caught in the middle of a brutal war between two hostile alien races, while the few human survivors left behind are forced to battle hunger, fear, and creatures twisted into something monstrous. When a mysterious injured boy appears with strange power and a message from his dreams, this sci-fi horror epic leans into destruction, survival, and the fragile possibility of hope in a world already broken.
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About the book
The New York Times–bestselling author "pulls out all the stops for this exhilarating alien-invasion epic . . . One of his finest" (Publishers Weekly, starred review).
It happened one day in April. Huge explosions in skies across the world heralded the coming of the Gorgon ships, sparking a worldwide panic. Indestructible, they blasted Earth’s greatest cities into rubble. Then, through portals opening in the air, came the skeletal Cyphers. And Earth became a battlefield in a war between two alien races bent on mutual destruction.
In Colorado, just over a hundred survivors have found sanctuary in the ruins of an apartment complex—and it’s not just the Gorgons and Cyphers who threaten them. They are regularly besieged by the Gray Men, humans mutated by something in the atmosphere into monstrosities straight out of nightmares.
With their ammunition and supplies dwindling, the remaining humans face a bleak future. Then one day, a teenage boy appears, seemingly human, seemingly the victim of catastrophic injuries. He can’t remember where he came from, but he senses a power within himself—one that causes an earthquake to repel a horde of Gray Men. A voice speaks to the boy in his sleep, telling him to find “the white mansion.” Now, the one thing the survivors need most of all is blossoming within them: hope. But only if they choose to trust in a boy who has no memory and only three words from a dream to guide him . . .
"A prime example of a master storyteller/writer returning to the type of novel that made him a master and an excellent addition to the alien invasion flavor of the Apocalyptic Novel canon." —SF Signal
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A groundbreaking invention destroys privacy forever, letting anyone see through walls, across the world, and even into the past.
The Light of Other Days
Sci-Fi
Our take
A groundbreaking invention destroys privacy forever, letting anyone see through walls, across the world, and even into the past. As secrets and history unravel, humanity is forced to reckon with a world where no lie remains hidden and no moment forgotten. What does it mean to live in a world of total transparency?
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About the book
When a visionary industrialist develops technology that lets anyone see through walls, around corners, and across the world, privacy is obliterated overnight. Suddenly, no secret is safe, no lie protected. Humanity must adjust to living in a world of total transparency.
But the true breakthrough arrives when this invention reveals the ability to peer into the past. Long-buried truths resurface, and history’s mysteries begin to unravel—but at what cost? As humanity gains unprecedented access to the private lives of others and the hidden moments of history, ethical and existential questions emerge.
In this transformative story of ambition, technology, and its profound consequences, humanity is forced to confront a startling question: what does it mean to truly know one another?
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In the Con Dao Archipelago, an octopus species with its own language and culture sparks a global race for control.
The Mountain in the Sea: A Novel
Sci-Fi
Our take
In the Con Dao Archipelago, an octopus species with its own language and culture sparks a global race for control. Marine biologist Dr. Ha Nguyen joins DIANIMA’s high-stakes mission to uncover their secrets, but as rival forces close in, the octopuses may have plans of their own—and humanity might not survive them.
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About the book
Marine biologist Dr. Ha Nguyen has dedicated her life to studying cephalopod intelligence. Now, she joins DIANIMA, a powerful tech corporation, to unlock the secrets of these remarkable creatures. With a war-scarred security agent and an android as her unlikely allies, she begins a groundbreaking journey.
But as competing forces close in, eager to exploit the octopuses, the stakes grow deadly. These creatures hold the key to unimaginable breakthroughs, but no one has asked what they want—or what they might do to survive.
Will humanity’s greed destroy its greatest discovery?
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A frozen mammoth, a mysterious box, and a mummified man spark a daring experiment.
Mammoth
Sci-Fi
Our take
A frozen mammoth, a mysterious box, and a mummified man spark a daring experiment. Thrust into the prehistoric past, a physicist and a veterinarian must navigate ancient dangers while protecting a baby mammoth—and uncovering the secrets of time itself. Can they solve the mystery before their journey changes history forever?
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About the book
A frozen mammoth. A mysterious box. A journey through time.
When visionary Howard Christian discovers a perfectly preserved mammoth in the Canadian wilderness, his dream of cloning the ancient creature becomes reality. But alongside the mammoth lies a baffling mystery: a metal box and the mummified remains of a man wearing a wristwatch.
To unlock the secrets of the box and revive the mammoth, a physicist and an elephant veterinarian are drawn into an extraordinary adventure. Flung thousands of years into the past, they uncover a world of prehistoric wonders—and dangers—while bringing a baby mammoth into the modern age.
As timelines blur and the stakes rise, they must solve the puzzle of the frozen relics before time itself unravels. The past and future collide in this thrilling tale of science, survival, and imagination.
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A warm, atmospheric fit for readers who like fantasy romance, magical islands, elemental spirits, mysteries, and reluctant allies.
A River Enchanted
Sci-Fi · Teen + Young Adult · Portal Fantasy
Our take
Called “vividly imagined” by Publishers Weekly, A River Enchanted follows bard Jack Tamerlaine as he returns to the magical isle of Cadence and joins his childhood enemy Adaira to investigate the disappearance of young girls and the elemental spirits connected to the mystery, with a 4.06-star average from more than 97,000 Goodreads ratings. A warm, atmospheric fit for readers who like fantasy romance, magical islands, elemental spirits, mysteries, and reluctant allies.
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About the book
“Exquisitely written with compelling characters and romance . . . I was swept away by the enchanting and magical world Rebecca Ross crafted, and loved every moment of it.” — Sue Lynn Tan, bestselling author of Daughter of the Moon Goddess
Enter the isle of Cadence in this novel from the #1 New York Times bestselling author of Divine Rivals—a Scottish-inspired fantasy brimming with enemies-to-lovers romance, magic and spirits, and a captivating mystery
It starts with a letter and an ominous journey across dark waters. Ten years after being sent away to the mainland to become a bard, Jack Tamerlaine is summoned home to Cadence. Girls are going missing from the island, and Adaira, his childhood nemesis and the future leader of the clan, believes Jack is the only one who can find them.
The elemental spirits that dwell in every breath of air, splash of water, blade of grass, and flicker of fire find mirth in the lives of the humans, and a bard’s music is the only way to summon them and ask that the girls be returned. Yet as Jack and Adaira get closer to solving the mystery, it becomes apparent that an older, darker secret about Cadence lurks beneath the surface, and no harp song may be strong enough to stop it.
With unforgettable characters, a thrilling plot, and a lush folklore-infused world, A River Enchanted is a stirring story of duty, love, and creating harmony between opposing forces. This first book in the Elements of Cadence duology marks Rebecca Ross’s brilliant entry on the adult fantasy stage.
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Magic birds, galactic invaders, and a dragon in disguise.
Isles of the Emberdark
Fantasy · Sci-Fi · Space Exploration · Space Opera
Our take
Magic birds, galactic invaders, and a dragon in disguise. Sixth of the Dusk is Brandon Sanderson’s newest Cosmere novel, expanding his beloved novella into an epic of survival, myth, and starbound ambition. With 4.8 stars on Amazon and stunning illustrations by Esther Hi’ilani Candari, this standalone adventure dives deep into both sea and sky.
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About the book
On the deadly island of Patji, Dusk is a trapper who lives by instinct, magic, and the supernatural birds he calls Aviar. But when invaders from the stars threaten to conquer his world, he must sail into the emberdark in search of salvation—armed only with his birds, a canoe, and his hard-won survival skills.
In the emberdark, a young dragon named Starling is trapped in human form, flying with a starship crew deep in debt and desperation. When she discovers a portal that could change everything, her path collides with Dusk’s in a galaxy-spanning race for freedom.
Sixth of the Dusk expands Sanderson’s original novella into a sweeping Cosmere novel full of myth, magic, and cosmic stakes. Survival isn’t guaranteed. But legends rarely start with safety.
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