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.
Why Check Out Past Deals?
Didn’t grab it when you should have? These past picks are still worth your time.
Still discounted? Some deals stick around longer than you'd think.
Fuel your TBR guilt-free. Add more, regret nothing.
Browse Past Deals
These Books Earned Our Seal of Approval—Snag Them Before They Vanish (Again)
Looking for spicy fantasy? Cozy mystery? A nonfiction rabbit hole? Use the filters below to search by genre, mood, or chaotic book-buying impulse.
Each book comes with retailer links. Just tap “Get Deal” and you’re off.
*Apropos Books is an affiliate marketer, which means we may earn advertising fees from qualifying purchases. These fees are paid by the retailer or affiliate partner, not added to your purchase price, so there’s no extra cost to you.*
Browse by genre
169 past books matching Space Exploration
Perfect for fans of big-idea sci-fi that dares to reshape the cosmos itself.
World Engines: Creator
Sci-Fi · Hard Sci-Fi · Space Exploration
Our take
Stephen Baxter’s World Engines: Creator is a sweeping multiverse adventure where alternate histories collide, dinosaurs roam, and humanity faces godlike architects of creation. With 4.4 out of 5 stars on Amazon, this high-concept epic delivers Baxter’s signature blend of science, wonder, and survival. Perfect for fans of big-idea sci-fi that dares to reshape the cosmos itself.
Choose your retailer
About the book
Alternate Earths. Colliding histories. Dinosaurs roaming alongside humanity’s ancestors. For the survivors of a crashed Russian spaceship, a British expedition, and time-strays from the future, survival is just the beginning.
Marooned on a planet shaped by unfathomable forces, the fractured crew must uncover the truth behind the mysterious World Engineers—beings powerful enough to sculpt solar systems and seed worlds with impossible life. Their influence stretches from Earth’s ancient past to the glowing mysteries of Saturn’s moons.
As tensions between the groups escalate, Malenfant, Deidra, and their uneasy allies must decide whether to pursue escape or risk everything to confront creators who may not be stopped, or even understood. The answers lie across universes, but the price of discovery could be annihilation.
Purchases through these links may earn Apropos Books a commission at no extra cost to you. Check the retailer for current price and availability.
E. E. “Doc” Smith’s Triplanetary (4.4 out of 5 stars on Amazon) launches the legendary Lensman saga, a Hugo finalist for Best All-Time Series.
Triplanetary
Sci-Fi · Space Exploration · Space Opera
Our take
E. E. “Doc” Smith’s Triplanetary (4.4 out of 5 stars on Amazon) launches the legendary Lensman saga, a Hugo finalist for Best All-Time Series. When alien invaders strip Earth of its iron, undercover agent Conway Costigan must sabotage their plans from inside their ship—or watch humanity be wiped out. A must-read for classic space opera fans.
Choose your retailer
About the book
Far from Earth, the planet Nevia faces a crisis: its amphibious rulers are running out of iron, their most vital resource. Their solution is simple and ruthless. Using technology that can strip iron from anything—stone, machinery, even human blood—they set their sights on Earth.
The attack is swift and devastating. Pittsburgh is obliterated, thousands are dead, and three human captives are taken aboard the alien ship. Among them is Conway Costigan, an undercover operative for the Triplanetary Patrol.
Trapped deep within enemy territory, Costigan must turn impossible odds into humanity’s only hope. The fate of every man, woman, and child on Earth depends on one man’s courage and ingenuity.
Before Star Wars or Star Trek, there was E. E. “Doc” Smith’s epic vision of intergalactic war.
Purchases through these links may earn Apropos Books a commission at no extra cost to you. Check the retailer for current price and availability.
Ideal for readers looking for hard science fiction about space colonization, closed ecosystems, and difficult survival decisions.
Aurora
Sci-Fi · Hard Sci-Fi · Space Exploration
Our take
A multigenerational starship finally approaches its destination, but ecological instability and limited resources force its passengers to reconsider whether humanity can survive beyond Earth, with a 3.8-star average from more than 28,200 Goodreads ratings. Ideal for readers looking for hard science fiction about space colonization, closed ecosystems, and difficult survival decisions.
Choose your retailer
About the book
A major new novel from one of science fiction's most powerful voices, Aurora tells the incredible story of our first voyage beyond the solar system.
Brilliantly imagined and beautifully told, it is the work of a writer at the height of his powers.
Our voyage from Earth began generations ago.
Now, we approach our new home.
AURORA.
Purchases through these links may earn Apropos Books a commission at no extra cost to you. Check the retailer for current price and availability.
A strong match for readers drawn to political intrigue, interstellar mysteries, and questions of cultural identity.
A Memory Called Empire
Sci-Fi · Military Sci-Fi · Space Exploration · Space Opera
Our take
Called “All around brilliant space opera” by Ann Leckie, this novel follows Ambassador Mahit Dzmare as she investigates her predecessor’s murder while trying to protect her independent home station from an expanding empire. A strong match for readers drawn to political intrigue, interstellar mysteries, and questions of cultural identity.
Choose your retailer
About the book
Winner of the 2020 Hugo Award for Best Novel
A Locus, and Nebula Award nominee for 2019
An NPR Favorite Book of 2019
An Esquire Best Sci-Fi Book of All Time
A Guardian Best Science Fiction and Fantasy Book of 2019 and “Not the Booker Prize” Nominee
A Goodreads Biggest SFF Book of 2019 and Choice Awards Nominee
"A Memory Called Empire perfectly balances action and intrigue with matters of empire and identity. All around brilliant space opera, I absolutely love it."—Ann Leckie, author of Ancillary Justice
Ambassador Mahit Dzmare arrives in the center of the multi-system Teixcalaanli Empire only to discover that her predecessor, the previous ambassador from their small but fiercely independent mining Station, has died. But no one will admit that his death wasn't an accident—or that Mahit might be next to die, during a time of political instability in the highest echelons of the imperial court.
Now, Mahit must discover who is behind the murder, rescue herself, and save her Station from Teixcalaan's unceasing expansion—all while navigating an alien culture that is all too seductive, engaging in intrigues of her own, and hiding a deadly technological secret—one that might spell the end of her Station and her way of life—or rescue it from annihilation.
Arkady Martine's debut novel A Memory Called Empire is a fascinating space opera and an interstellar mystery adventure.
"The most thrilling ride ever. This book has everything I love."—Charlie Jane Anders, author of All the Birds in the Sky
Purchases through these links may earn Apropos Books a commission at no extra cost to you. Check the retailer for current price and availability.
An elite interstellar agent lands on a volatile planet expecting political trouble and finds something far stranger waiting for him.
The Godmakers
Sci-Fi · Space Exploration
Our take
An elite interstellar agent lands on a volatile planet expecting political trouble and finds something far stranger waiting for him. In The Godmakers, Lewis Orne’s mission shifts when he develops extraordinary psychic powers and is drawn into the world of Hamal’s so-called gods. What follows blends galactic intrigue, evolving identity, and big questions about power, destiny, and what it really means to become more than human.
Choose your retailer
About the book
An interstellar agent discovers his latent powers while investigating a warlike planet in this classic sci-fi fantasy by the author of Dune.
It's been centuries since the devastating Rim Wars separated numerous planets from the protection and control of the galactic empire. The Rediscovery and Reeducation Service is dedicated to finding these "lost planets" and returning them to the fold. But not all civilizations are eager to cooperate.
Young and charismatic, Lewis Orne is one of the best R&R agents in the organization's history. But when he identifies troubling signs on the planet of Hamal, he is transferred to Investigative Adjustment, the agency that specializes in dealing with violent worlds. Suddenly, Orne is shuttling to the edge of the galaxy to detect any signs of latent aggression among Hamal's population.
Shortly after making landfall, Orne makes a far more astonishing discovery: he suddenly finds himself in possession of profound extrasensory powers. When these powers become known, he is invited to join Hamal's company of "gods." It is an offer too enticing to refuse. Yet being a god comes with certain expectations . . .
Purchases through these links may earn Apropos Books a commission at no extra cost to you. Check the retailer for current price and availability.
With 4.4 out of 5 stars on Amazon, this high-octane series starter is perfect for fans of The Expanse and The Mandalorian.
Titanborn
Sci-Fi · Military Sci-Fi · Space Exploration
Our take
Titan wants freedom. Earth wants control. And Malcolm Graves just wants a paycheck. In Titanborn, USA Today bestseller Rhett C. Bruno delivers a gritty sci-fi mystery packed with explosions, rebellion, and reluctant teamwork. With 4.4 out of 5 stars on Amazon, this high-octane series starter is perfect for fans of The Expanse and The Mandalorian.
Choose your retailer
About the book
Malcolm Graves is a Collector—part bounty hunter, part corporate clean-up crew. After decades chasing criminals across the solar system, he’s earned a reputation for asking no questions and getting the job done.
But when a devastating bombing rocks Earth’s capital, everything shifts. Malcolm is forced to partner with a cyber-enhanced rookie who runs on data, not instinct. Together, they’re sent to track down a rebel group from Titan, where unrest is boiling over into all-out war.
Malcolm hates partnerships. He hates politics even more. But he’s about to get a crash course in both.
The rebellion is coming. And if these two can’t stop it, the solar system’s fragile order could go up in flames.
The job just got personal.
Purchases through these links may earn Apropos Books a commission at no extra cost to you. Check the retailer for current price and availability.
With 4.5 out of 5 stars on Amazon, Exodus: The Archimedes Engine by Peter F. Hamilton launches a galaxy-spanning sci-fi epic.
Exodus: The Archimedes Engine
Sci-Fi · Space Exploration
Our take
With 4.5 out of 5 stars on Amazon, Exodus: The Archimedes Engine by Peter F. Hamilton launches a galaxy-spanning sci-fi epic. In the Centauri Cluster, ancient arkships and godlike Celestials clash as a new generation fights for freedom. Packed with rebellion, discovery, and sprawling worldbuilding, this is classic space opera with a modern pulse.
Choose your retailer
About the book
Forty thousand years ago, humanity fled a dying Earth aboard massive arkships, scattering across the stars. In the Centauri Cluster, the survivors built a new civilization, one ruled by the Celestials, godlike beings who divided the stars into warring Dominions.
Finn has only ever known life under the Crown Dominion’s grip. But when a long-lost arkship from Earth reappears, it offers more than a history lesson—it offers a rebellion.
Drawn into the fight for freedom, Finn joins the Travelers, explorers and warriors determined to break the Celestials’ hold and reclaim humanity’s destiny among the stars.
In Exodus: The Archimedes Engine, Peter F. Hamilton delivers a pulse-pounding space opera of rebellion, ancient secrets, and the unyielding human drive to reach beyond the stars.
Purchases through these links may earn Apropos Books a commission at no extra cost to you. Check the retailer for current price and availability.
Perfect for fans of Zahn and Haldeman.
Prophet
Sci-Fi · Space Exploration · Space Opera
Our take
With 4.3 out of 5 stars on Amazon, Prophet by five-time Hugo Award winner Mike Resnick is a sharp, character-driven space opera. A galaxy fears Penelope Bailey, a psychic fugitive turned prophet. But when the assassin known as the Iceman gets caught in the crossfire, the battle for control turns personal, and deadly. Perfect for fans of Zahn and Haldeman.
Choose your retailer
About the book
Penelope Bailey has been called many things—psychic, fugitive, weapon. Now she’s the Prophet, no longer hiding from the galaxy’s power players who’ve spent decades trying to kill or control her.
The Iceman, an assassin turned bar owner, has survived crossing her path twice. That makes him a rare man, and a marked one. With enemies closing in, he teams up with the lethal Gravedancer to untangle a conspiracy that stretches from back-alley deals to interstellar politics.
On a distant planet, Penelope waits. She knows what’s coming. She’s seen it.
In this fast-paced classic of space opera, five-time Hugo Award winner Mike Resnick weaves assassins, psychics, and political intrigue into a final showdown where survival isn’t a question of skill, but destiny.
Purchases through these links may earn Apropos Books a commission at no extra cost to you. Check the retailer for current price and availability.
A mysterious dark nebula begins to spread beyond the edge of known space, swallowing light and unsettling a fragile galactic order.
The Dark Between the Stars
Sci-Fi · First Contact · Hard Sci-Fi · Space Exploration
Our take
A mysterious dark nebula begins to spread beyond the edge of known space, swallowing light and unsettling a fragile galactic order. In The Dark Between the Stars, humans, Roamer clans, and the ancient Ildiran Empire must confront a threat older than memory itself. This sweeping space opera weaves interstellar politics, alien cultures, and cosmic horror into an expansive saga about survival on a universal scale.
Choose your retailer
About the book
Return to the Seven Suns universe a terrifying celestial discovery threatens the future for humanity and the Ildirans in this space opera trilogy opener.
"Anderson hits it out of the galaxy again: space opera doesn't get much more exciting, or much more richly populated with alien races, technologies, and cultures, than it does in this sprawling, engrossing epic." —Booklist (starred review)
Hugo Award Nominee
Two decades after the end of the horrific Hydrogue War, a group of independent clans, the Roamers, operate giant floating skymines in the clouds of gas-giant planets, where they harvest stardrive fuel at great risk, and great profit.
On the planet Theroc, capital of the vast Confederation, humans live inside a gigantic worldforest whose towering trees are all interconnected in a single mind, which telepathic "green priests" can use for interstellar communication.
The stagnant alien Ildiran Empire once ruled the entire Spiral Arm, but they are unprepared for human politics and ambitions.
Upon this galactic canvas, a large expeditionary ship goes off to explore farther than any human or Ildiran has ever ventured. Beyond the edge of the Spiral Arm, they encounter a mysterious and ominous dark nebula, a huge black cloud so opaque that even starlight cannot penetrate it. The explorers are horrified when the dark nebula begins to expand exponentially.
The races of the Spiral Arm will be faced with an evil so ancient that knowledge of its very existence has been obliterated, but it will threaten all life, all planets, and even the fabric of the universe itself.
"A space opera to rival the best the field has ever seen." —Science Fiction Chronicle
Purchases through these links may earn Apropos Books a commission at no extra cost to you. Check the retailer for current price and availability.
Best for readers who like survival-driven, generation-spanning sci-fi.
Children of Memory
Sci-Fi · Hard Sci-Fi · Space Exploration · Space Opera
Our take
In this far-reaching space opera, a fragile human colony survives generations after Earth’s failure, losing technology while clinging to life on a terraformed planet. When strangers arrive with advanced knowledge and promises of help, their rescue may come at the colony’s expense, with a 4.3-star rating from more than 9,800 Amazon reviewers. Best for readers who like survival-driven, generation-spanning sci-fi.
Choose your retailer
About the book
The modern classic of space opera that began with Children of Time continues in this extraordinary novel of humanity's battle for survival on a terraformed planet.
Earth failed. In a desperate bid to escape, the spaceship Enkidu and its captain, Heorest Holt, carried its precious human cargo to a potential new paradise. Generations later, this fragile colony has managed to survive, eking out a hardy existence. Yet life is tough, and much technological knowledge has been lost.
Then strangers appear. They possess unparalleled knowledge and thrilling technology – and they've arrived from another world to help humanity’s colonies. But not all is as it seems, and the price of the strangers' help may be the colony itself.
Children of Memory by Arthur C. Clarke Award-winning author Adrian Tchaikovsky is a far-reaching space opera spanning generations, species and galaxies.
Purchases through these links may earn Apropos Books a commission at no extra cost to you. Check the retailer for current price and availability.
A structure built as a monument to peace becomes a machine of conquest with entire worlds trapped inside its reach.
Ancestral Machines
Sci-Fi · First Contact · Space Exploration
Our take
A structure built as a monument to peace becomes a machine of conquest with entire worlds trapped inside its reach. In Ancestral Machines, a smuggler captain enters the Warcage to save his crew after an agri-world is torn from orbit, stepping into a brutal space opera shaped by alien power, survival, and ruin on a massive scale.
Choose your retailer
About the book
A new standalone epic space opera, set in the same world as the Humanity's Fire trilogy.
No world is safe.
The Warcage: two hundred worlds harnessed to an articial sun in a feat of unprecedented stellar engineering. Built to travel through space as a monument to peace between alien species, now its voracious rulers have turned it into a nightmarish wasteland, capturing new planets for slaves and resources, then discarding the old.
Now, when a verdant agri-world is pulled out of its orbit, the captain of a smuggler ship must journey into the Warcage to rescue his crew.
Purchases through these links may earn Apropos Books a commission at no extra cost to you. Check the retailer for current price and availability.
Ideal for readers looking for cerebral science fiction, Gothic atmosphere, recurring realities, and a slowly unfolding mystery.
Eversion
Sci-Fi · Hard Sci-Fi · Space Exploration · Space Opera
Our take
Dr. Silas Coade serves as physician aboard a series of expeditions separated by centuries, from a sailing ship and an airship to a spacecraft approaching a mysterious alien structure. As each journey ends in disaster, Silas begins to question why events keep repeating. Ideal for readers looking for cerebral science fiction, Gothic atmosphere, recurring realities, and a slowly unfolding mystery.
Choose your retailer
About the book
From the master of the space opera comes a dark, mind-bending adventure spread across time and space, where Doctor Silas Coade is tasked with keeping his crew safe as they adventure across the galaxy in search of a mysterious artifact.
In the 1800s, a sailing ship crashes off the coast of Norway. In the 1900s, a Zepellin explores an icy canyon in Antarctica. In the far future, a spaceship sets out for an alien artifact. Each excursion goes horribly wrong. And on every journey, Dr. Silas Coade is the physician, but only Silas seems to realize that these events keep repeating themselves. And it's up to him to figure out why and how. And how to stop it all from happening again.
Purchases through these links may earn Apropos Books a commission at no extra cost to you. Check the retailer for current price and availability.
Don’t Want to Miss Another Deal?
Get the best Kindle book deals delivered straight to your inbox. We feature new must read books every day—always hand-picked, never random—with links to Amazon, Barnes & Noble, or Kobo. Some discounts disappear fast, others linger (or come back around), so it’s worth keeping an eye out.