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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169 past books matching Space Exploration
A gripping sci-fi epic of survival, intrigue, and hope at the edge of the galaxy, Permanence is a must-read for fans of interstellar adventure.
Permanence
Sci-Fi · Hard Sci-Fi · Space Exploration
Our take
On the run from her ruthless brother, Rue Cassels stumbles upon an abandoned Cycler starship—a discovery that could save her fading civilization. But powerful factions, warring empires, and alien secrets threaten to claim it first. A gripping sci-fi epic of survival, intrigue, and hope at the edge of the galaxy, Permanence is a must-read for fans of interstellar adventure.
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About the book
Rue Cassels never expected to change the fate of an entire civilization—she just wanted to survive.
On the run from her ruthless brother, who has stolen her inheritance and plans to sell her into slavery, Rue flees her home among the dying Cycler Compact. She stakes a claim on what she believes to be a valuable comet, only to discover something even more extraordinary—an abandoned Cycler starship, a relic from a fading way of life.
But Rue’s discovery doesn’t go unnoticed. Greedy factions, warring empires, and powerful forces all want control of the last great hope for the Compact’s survival. With strange alien artifacts and a mysterious religion shaping her path, Rue must navigate perilous intrigue to claim her destiny among the stars.
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James T. Kirk faces his greatest challenge yet—aligning with his tyrannical mirror-universe counterpart, Emperor Tiberius, to save his dying wife.
Preserver: Shatnerverse: Mirror Universe
Sci-Fi · First Contact · Space Exploration · Space Opera
Our take
James T. Kirk faces his greatest challenge yet—aligning with his tyrannical mirror-universe counterpart, Emperor Tiberius, to save his dying wife. As Captain Picard and Starfleet close in, Kirk must navigate betrayal, power struggles, and an ancient secret that could reshape the galaxy. A gripping Star Trek adventure that pits two Kirks against the fate of two universes.
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About the book
Two universes. Two captains. One final showdown.
Emperor Tiberius, the ruthless counterpart of James T. Kirk from the mirror universe, has his sights set on a power greater than any he’s ever known. With an ancient First Federation base as his target, he plans to seize control of the galaxy. But to get there, he needs the one man he despises most—Starfleet’s Kirk.
Desperate to save his dying wife, Kirk makes a dangerous bargain, guiding Tiberius on his mission. But as Captain Jean-Luc Picard and his crew race to stop them, Kirk uncovers secrets that threaten the existence of both universes.
In the epic conclusion of Spectre and Dark Victory, William Shatner delivers a thrilling Star Trek adventure where the fate of two realities hangs in the balance.
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A devastating alien force is on a collision course with Earth, and only one ship can stop it.
Star Trek: The Motion Picture
Sci-Fi · First Contact · Space Exploration
Our take
A devastating alien force is on a collision course with Earth, and only one ship can stop it. To face this overwhelming threat, Starfleet calls back the Enterprise and her legendary crew for one last mission. Celebrate 40 years of Star Trek: The Motion Picture with Gene Roddenberry’s classic novelization—a must-have for every Star Trek fan.
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About the book
Celebrate the 40th anniversary of Star Trek: The Motion Picture with this classic novelization written by Gene Roddenberry himself.
The Enterprise’s legendary five-year mission has ended. Kirk, Spock, McCoy, and the crew have gone their separate ways, pursuing new careers and lives beyond the final frontier. But when an unfathomable alien force obliterates everything in its path and sets a direct course for Earth, Starfleet has only one hope: a newly refitted Enterprise and the crew that once made history.
With time running out and the fate of the Federation hanging in the balance, Kirk must reunite his crew for their most dangerous mission yet—one that will test their loyalty, their limits, and the very meaning of exploration.
A must-read for Star Trek fans, this novelization brings to life the epic return of the Enterprise.
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A 5,000-year-old mystery.
Time’s Enemy: Invasion!
Sci-Fi · First Contact · Space Exploration · Space Opera
Our take
A 5,000-year-old mystery. A battle lost to time. A ship that shouldn't exist. When the crew of Deep Space Nine™ finds a frozen, wrecked Defiant from the past, Sisko must unravel the impossible truth before history repeats itself—at the cost of the Alpha Quadrant. A thrilling Star Trek: DS9™ adventure you won’t want to miss!
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About the book
A battle lost to time. A war waiting to begin. A mystery that could shatter the Federation.
When a battered version of the Defiant, frozen in ice for 5,000 years, is discovered, Captain Sisko and the crew of Deep Space Nine™ are summoned to solve an impossible riddle: How did their ship end up centuries in the past? And does its destruction mean doom for them all?
As they unravel the enigma, the truth reveals an ancient conflict that never truly ended—one that could soon ignite a war across the Alpha Quadrant. Only the wormhole holds the key to the past, the future, and the fate of the Federation itself.
A thrilling Star Trek: Deep Space Nine™ adventure that blends mystery, time travel, and high-stakes action!
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A mind-reader conscripted into the military.
Ocean’s Echo
LGBTQIA+ · Sci-Fi · Space Exploration · Space Opera
Our take
A mind-reader conscripted into the military. A duty-bound soldier ordered to control him. But instead of obeying, they fake the bond. In Ocean’s Echo, a standalone sci-fi adventure from Everina Maxwell, Tennal and Surit’s deception spirals into a war, a conspiracy, and an impossible choice. Can two unwilling weapons of war change the fate of worlds?
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About the book
A mind-reader and a mind-controller. A fake bond that could save them—or destroy them both.
Tennalhin Halkana is a flirt, a disaster, and a security risk. As a reader, he can read minds and navigate chaotic space, making him both valuable and dangerous. Drafted into the military against his will, he’s ordered to sync with Lieutenant Surit Yeni, a principled soldier and an architect—someone who can control minds. But Surit refuses to force the bond. Instead, they fake it.
Their deception is pushed to the brink when a mission unearths a terrifying power that could change the balance of the galaxy. Now, their fake sync may be the only way to survive.
A thrilling standalone sci-fi adventure set in the world of Winter’s Orbit, Ocean’s Echo delivers intrigue, romance, and high-stakes action.
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A gritty, action-packed military sci-fi perfect for fans of The Expanse and Starship Troopers!
Conscript
Sci-Fi · First Contact · Space Exploration
Our take
Jail or the Marines. Po chose war. Caught committing a crime to save his family, he’s given one way out: join the fight. But war has come sooner than expected, and humanity’s deadliest enemy has returned. A gritty, action-packed military sci-fi perfect for fans of The Expanse and Starship Troopers!
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About the book
Jail or the Marines. Po Abbato had no choice.
Trying to free his siblings from debt slavery, Po turns to crime—and gets caught. His punishment? 25 years in a digital prison while his body rots… or enlistment in the Marines. The decision is easy. Surviving the war that’s about to erupt? That’s another story.
The enemy is back. Humanity’s greatest threat has returned, and Po must learn fast what it truly means to fight, survive, and trust his squad. Because if he fails, it won’t just be his life on the line—it’ll be the fate of the solar system.
Fast-paced, action-packed, and brutal, this is military sci-fi at its finest. If you love The Expanse or Starship Troopers, you don’t want to miss this!
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A war humanity can’t win.
Battleship Leviathan: The Complete Series
Sci-Fi · Space Exploration
Our take
A war humanity can’t win. A derelict warship that isn’t dead. Battleship Leviathan is the last hope for survival. Major Declan Payne takes command of an ancient doomsday weapon, but will it be enough? Get all six books in this explosive military sci-fi series from bestseller Craig Martelle—2000+ pages of space fleet action!
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About the book
All six books. 2000+ pages. Explosive military sci-fi action.
A derelict warship, ancient but still alive. A small team of humans fighting for all humanity.
Eons ago, the Progenitors built the ultimate warship to drive away the galactic conquerors. It worked… until it didn’t. The Progenitors vanished, leaving relics behind as monuments to their failure. Now, humanity has spread to the stars—only to find itself at war with the unstoppable Blaze Collective. Desperate for an advantage, they search for ancient technology, but all that remains are gutted derelicts.
Except for one.
Major Declan Payne boards Battleship Leviathan, discovering a weapon engineered for total annihilation—and a ship that needs him as much as humanity needs it.
Experience this complete military sci-fi epic from bestselling author Craig Martelle. Perfect for fans of Rick Partlow, Jay Allan, and Joshua Dalzelle.
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Mia Kerrick was raised to be a soldier.
Brutal Response Complete Series
Sci-Fi · Space Exploration · Space Opera
Our take
Mia Kerrick was raised to be a soldier. Now, her father is dead under classified circumstances, and no one will tell her why. To find answers, she must infiltrate the most elite fighter training school in the Confederacy—a private military academy where everyone is both ally and enemy. A gripping sci-fi adventure of secrets, survival, and betrayal.
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About the book
It’s hard to live up to your father’s legacy when he was a force of nature.
Mia Kerrick was raised to be a soldier. While other young women in the Kerrick Confederacy attended school, she trained in firearms, tactics, and piloting—preparing for the day she could surpass her father, a man shrouded in secrecy.
That day will never come.
When Mia learns her father has died under classified circumstances, she refuses to accept silence as an answer. Determined to uncover the truth, she embarks on a dangerous journey into the world’s largest city, where betrayals push her toward an unexpected path—the most elite fighter training school in the Confederacy.
Now, in a private military academy where everyone is both friend and foe, Mia must survive a nest of vipers. Can she outfight, outthink, and outlast them to learn the truth?
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After an asteroid strike shatters the Moon, humanity faces extinction unless it can flee the solar system.
Voyage of No return
Sci-Fi · Teen + Young Adult · Space Exploration · Space Opera
Our take
After an asteroid strike shatters the Moon, humanity faces extinction unless it can flee the solar system. Project Orpheus plans a desperate migration to Kepler-442b, sending Steven Rhodes ahead while his daughter Emily follows years later aboard a second ship. This high-stakes science fiction novel explores interstellar survival, generational sacrifice, and the perilous hope of a second chance among the stars.
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About the book
AN ASTEROID HAS CRASHED INTO THE MOON, AND ITS FRAGMENTS ARE THREATENING TO DESTROY LIFE AS WE KNOW IT.
The only hope for mankind is Project Orpheus, an unprecedented initiative on the part of the allied
governments to enable human life to continue on Kepler-442b, a planet over a thousand light years from
Earth.
Two spaceships are under construction, which will leave for that remote solar system with a specialized crew to
terraform the planet and make it habitable. Steven Rhodes, the director of Project Orpheus, will travel in the first of
them. His daughter Emily, a specialist technician in Artificial Intelligence, will follow on the second ship, five years later.
However, the journey will be full of dangers which the ship's crew will have to confront.
WILL EMILY BE ABLE TO JOIN HER FATHER AND BEGIN A NEW LIFE AT THE OTHER END OF THE UNIVERSE? WILL MANKIND BE GIVEN A SECOND CHANCE FAR AWAY FROM THE EARTH?
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Abducted from Earth in 2023, Lieutenant William Jackson awakens in a distant future with a rare genetic gift that could save—or doom—humanity.
Legacy – Emergence
Sci-Fi · Space Exploration
Our take
Abducted from Earth in 2023, Lieutenant William Jackson awakens in a distant future with a rare genetic gift that could save—or doom—humanity. Conscripted into a galactic military and hunted by enemies, he must master ancient alien technology to tip the scales of power. A thrilling sci-fi adventure of survival, loyalty, and destiny.
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About the book
Ripped from Earth. Thrust into the future. The fate of humanity rests in his hands.
Lieutenant William Jackson isn’t like any other officer in the Galactic Coalition of Humanity. He harbors a secret no one can know—because he doesn’t belong in this time. Abducted from Earth in 2023 by an enigmatic alien race, William learns he possesses a rare genetic gift: the ability to activate ancient alien technology powerful enough to reshape the galaxy.
With the balance of power at stake, William must navigate a treacherous future where humanity’s survival hangs by a thread. Conscripted into military service, aided only by his loyal AI, Bits, he faces enemies who would see humanity hunted to extinction.
This is the story of William Jackson—soldier, covert operative, man out of time. The savior of humanity… or the destroyer of worlds.
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When a star radiates mysterious signals, Dr.
Blue Anomaly
Sci-Fi · First Contact · Hard Sci-Fi · Space Exploration
Our take
When a star radiates mysterious signals, Dr. Tristan Smolensky embarks on an interstellar mission to uncover its secrets. But as science collides with the unknown, his discoveries could redefine humanity’s place in the universe—or end it entirely. A hard sci-fi adventure packed with real science and speculative wonder. Includes dual alternative endings!
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About the book
An unparalleled interstellar voyage grounded in real science—with a mind-bending twist.
When scientists detect a mysterious star emitting undecipherable signals, renowned astrophysicist Dr. Tristan Smolensky is sent to investigate. But what begins as a mission to uncover cosmic secrets quickly spirals into a journey that challenges everything Tristan knows about science—and reality itself.
Is the star a beacon from an advanced civilization? A natural cosmic anomaly? Or something far more sinister? As Tristan ventures deeper into the unknown, he faces discoveries that could elevate humanity’s place in the universe—or end it entirely.
Blending rigorous astrophysical research with speculative science fiction, this hard sci-fi adventure explores the fragile line between knowledge and mystery. Bonus: Includes dual alternative endings for an unforgettable reading experience.
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James Enoch was supposed to be dead.
Silence of the Stars
Sci-Fi · Space Exploration
Our take
James Enoch was supposed to be dead. Lania Surkov just wanted to go home. Instead, they’re lightyears from Earth, caught between a rogue colony and the threat of interstellar war. Ancient secrets, alien tech, and political intrigue collide in this gripping sci-fi thriller. Humanity’s future rests in the hands of two unlikely heroes.
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About the book
James Enoch was supposed to be dead. His archaeology career—and his life—ended in the fiery chaos of a botched excavation. Lania Surkov, a disgraced planetologist, wants nothing more than to restore her standing with the Terran Coalition and return to Earth. But after a century in cryo-sleep, both awaken lightyears from home with a mission that could ignite an interstellar war.
Cambridge II was believed to be a barren wasteland. Instead, it holds a thriving human colony—one predating the Coalition and powered by an alien terraforming device. As tensions escalate, James and Lania find themselves the only barrier between humanity and catastrophe.
In this gripping sci-fi thriller, ancient secrets collide with political intrigue. The fate of two worlds rests on those who have already lost everything.
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