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
Perfect for fans of The Martian and Project Hail Mary.
Colony Two Mars
Sci-Fi · Hard Sci-Fi · Space Exploration
Our take
She’s the last survivor on Mars—until a man appears in the airlock… and dies. The twist? He already died years ago. In this gripping sci-fi thriller, one woman must cross Jezero Crater to find the truth—or face dying alone. Perfect for fans of The Martian and Project Hail Mary. Click now to uncover what lies in Colony Two.
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About the book
Stranded. Contaminated. Forgotten.
As the sole survivor of a doomed ISA mission, she’s marooned on Mars—declared a biohazard and cut off from Earth. Her fate is to live out her final days in isolation… until an unconscious man appears in the colony’s airlock.
He dies before speaking a word.
Even more impossible? DNA confirms he’s a long-dead colonist from Colony Two—an outpost presumed lost years ago.
With only one lead and dwindling time, she must brave the deadly expanse of Jezero Crater to uncover the truth. Because if someone—or something—is still alive out there, it may be her last chance for answers… and survival.
Perfect for fans of The Martian and Arrival, this is a pulse-pounding, cerebral thriller about survival, identity, and the mysteries buried beneath Martian dust.
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Perfect for fans of The Expanse and hard sci-fi done right.
The Belt – Complete Series
Sci-Fi · Space Exploration
Our take
Quantum AI. System-wide chaos. Humanity on the brink. The Belt Series box set brings you six full-length novels and 1200+ pages of non-stop sci-fi thrills. Join a survey crew caught in a power struggle that spans the solar system—from asteroid mines to Martian megacities. Perfect for fans of The Expanse and hard sci-fi done right. Click now to binge the series.
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About the book
Six books. One epic sci-fi saga. Over 1200 pages of high-stakes action, AI intrigue, and humanity on the edge.
Out in the asteroid belt, survival is already a challenge—until a small survey crew stumbles upon a derelict ship carrying a quantum intelligence device that could tip the balance of power across the solar system.
What follows is a system-wide struggle for control over AI technology, with the crew caught in the middle. From the rugged Belt to the icy moons of Jupiter, the red towers of Mars, and the scorched ruins of Earth, this is a battle not just for survival—but for humanity’s future.
The Belt Series is smart, fast-paced, and deeply human. Perfect for fans of The Expanse and Hard Sci-Fi with heart. Get all six books in one unbeatable box set.
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Humanity’s expansion into space exposes both its ambition and its fractures.
Into the Stars
Sci-Fi · First Contact · Space Exploration
Our take
Humanity’s expansion into space exposes both its ambition and its fractures. As Earth prepares to colonize Alpha Centauri, a deep-space probe uncovers a discovery that reshapes the meaning of exploration itself. New fleets form, alliances strain, and old rivalries resurface under mounting pressure. Into the Stars is a military science fiction novel focused on first contact, political tension, and the fragile balance between discovery and survival.
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About the book
The stars are within mankind’s reach…
…But what awaits in the void may end humanity…
Mars and the Moon have been colonized, piracy runs rampant in the asteroid belts, and a thriving society grows in the depths of space. Humanity prepares to embark upon its greatest journey—the colonization of Alpha Centauri.
Then everything changes…
A deep space reconnaissance probe discovers a new Earth-like planet twelve light-years from Earth’s sun. The probe also finds something unusual, something…unnerving. A new mission is created, a space fleet is formed, and humanity embarks on unraveling the greatest mystery of all—the origins of life itself.
Can the factions of Earth remain united, or will old rivalries and animosities destroy the fragile peace in the face of this terrifying existential threat?
Will exploration prove to be a fatal mistake?
If you love new technologies, fast-paced action and gut-wrenching turns of fate, you’ll love this first book in James Rosone’s military sci-fi series, The Rise of the Republic.
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Perfect for longtime fans and new readers alike, this 4.5-star epic honors 50 years of Star Trek legacy.
Star Trek Legacies: Purgatory’s Key
Sci-Fi · First Contact · Space Exploration · Space Opera
Our take
Interdimensional secrets. Stolen tech. The fate of peace across two universes. In the stunning finale of Star Trek: Legacies, Kirk and crew race to stop a galactic war and rescue Sarek from a vanishing realm. Perfect for longtime fans and new readers alike, this 4.5-star epic honors 50 years of Star Trek legacy. Click now to join the final mission.
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About the book
Two universes. One stolen device. Zero room for error.
For nearly two decades, the captains of the Starship Enterprise—from April to Pike to Kirk—have guarded a powerful interdimensional secret. Now that secret has been stolen by Romulan agents, plunging Ambassador Sarek and Councillor Gorkon into an unknown universe and threatening to unravel hard-won Federation-Klingon peace talks.
With tensions boiling across galaxies and alien forces stirring in another dimension, Captain James T. Kirk must lead his crew into uncharted territory—both literal and existential—to recover the device and rescue the diplomats before all-out war ignites.
This explosive finale to the Star Trek: Legacies trilogy ties together the franchise’s storied past and future, just in time for the 50th anniversary.
Because some legacies are written across galaxies.
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Pulled from his own time and thrust into a distant future, he becomes the key to a war he never chose.
Legacy – Emergence
Sci-Fi · Space Exploration · Space Opera
Our take
Pulled from his own time and thrust into a distant future, he becomes the key to a war he never chose. In Legacy - Emergence, Lieutenant William Jackson discovers he alone can activate ancient alien technology powerful enough to reshape galactic power. Conscripted into military service and hunted by rival forces, he must decide whether his rare gift will save humanity or end it in this high-stakes space opera adventure.
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About the book
Lieutenant William Jackson isn't like any other officer in the GCH. He lives a guarded life, unable to share the truth about who he really is, where he comes from, and what he can do.
Ripped from Earth in the year 2023, he arrives in the distant future, brought there by an enigmatic alien race with their own hidden agenda. Soon he discovers the reason for his abduction - an incredibly rare genetic gift allowing him to activate alien technology left behind by a powerful Ancient race that once ruled the galaxy. Technology so advanced it has the potential to alter the balance of galactic power if it falls into the wrong hands and could mean the difference between keeping humanity safe or being hunted into extinction.
Aided by his trusty AI, Bits, he's forced to adapt to his new life as he's conscripted into military service and struggles to survive in a galaxy teeming with danger and enemies' intent on the downfall of humanity.
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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Perfect for fans of Firefly and The Expanse who prefer hugs over heavy artillery.
The Long Way to a Small, Angry Planet
Sci-Fi · Space Exploration · Space Opera
Our take
Misfit crew. Massive mission. Endless heart. Becky Chambers’ The Long Way to a Small, Angry Planet is a Hugo-winning space opera bursting with charm, quirky characters, and cozy sci-fi vibes. Perfect for fans of Firefly and The Expanse who prefer hugs over heavy artillery. 4.5 stars on Amazon. Click now to board the Wayfarer—the universe’s most lovable spaceship.
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About the book
All Rosemary Harper wanted was a ride into deep space and a quiet bunk far from her past. What she got was a secondhand spaceship, a crew of loveable misfits, and a front-row seat to the wildest wormhole job in the galaxy.
Aboard the Wayfarer, chaos is the norm—from tea with a sentient AI to mid-flight philosophical debates with a lizard-like pilot. But when a high-stakes tunneling mission goes sideways, the crew must rely on each other to survive.
Becky Chambers’ The Long Way to a Small, Angry Planet is a joyful, character-driven space opera about friendship, found family, and what it truly means to belong. Winner of the Hugo Award for Best Series, it’s cozy sci-fi with heart, humor, and hope among the stars.
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Humanity’s first interstellar mission was meant to bring peace—not bodies.
Starman’s Saga
Sci-Fi · Hard Sci-Fi · Space Exploration
Our take
Humanity’s first interstellar mission was meant to bring peace—not bodies. BerthRight delivers gritty sci-fi suspense as Leif Grettison, a lottery “winner” with a soldier’s past, becomes the glue holding a fractured crew together. Think The Martian meets The Expanse. 4.5 stars on Amazon. Click now to suit up for a journey where everything can—and does—go wrong.
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About the book
In 2069, Earth’s last shot at peace is one spaceship—and one crew—away from unraveling.
Leif Grettison wasn’t supposed to be here. He won the final seat on humanity’s first interstellar mission in a global lottery. But he’s no average joe—he’s a battle-hardened paramedic, lab tech, and former Army Ranger. Now he’s the unofficial muscle aboard a ship full of fragile alliances and national grudges, barreling toward an alien world no one really understands.
The journey spans fourteen Earth years. The dangers? Immeasurable.
When systems fail, tensions spike, and crew members start dying, Leif must become more than a handyman—he must be humanity’s last line of defense against the unknown.
Because space doesn’t care how well you planned. And out here, there’s no calling for backup.
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Ideal for readers looking for large-scale science fiction about evolution, first contact, competing civilizations, and humanity’s future.
Children of Time
Sci-Fi · Space Colonization · Space Exploration
Our take
Arthur C. Clarke Award winner Children of Time follows the last remnants of humanity as they reach a terraformed planet that has developed a civilization of its own. The two civilizations are placed on a collision course as each fights to survive. Ideal for readers looking for large-scale science fiction about evolution, first contact, competing civilizations, and humanity’s future.
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About the book
Adrian Tchaikovsky's Arthur C. Clarke Award-winning novel Children of Time is the epic story of humanity's battle for survival on a terraformed planet.
Who will inherit this new Earth?
The last remnants of the human race left a dying Earth, desperate to find a new home among the stars. Following in the footsteps of their ancestors, they discover the greatest treasure of the past age—a world terraformed and prepared for human life.
But all is not right in this new Eden. In the long years since the planet was abandoned, the work of its architects has borne disastrous fruit. The planet is not waiting for them, pristine and unoccupied. New masters have turned it from a refuge into mankind's worst nightmare.
Now two civilizations are on a collision course, both testing the boundaries of what they will do to survive. As the fate of humanity hangs in the balance, who are the true heirs of this new Earth?
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Danger, secrets, and action collide in book two of Timothy Zahn’s Dragonback saga—perfect for fans of fast-paced sci-fi and reluctant heroes.
Dragon and Soldier
Sci-Fi · Space Exploration · Space Opera
Our take
Jack’s just a teenage fugitive—until a dragon-shaped alien bonds with him to survive. Now they’re uncovering who destroyed Draycos’s people… by infiltrating a mercenary force that uses kids as soldiers. Danger, secrets, and action collide in book two of Timothy Zahn’s Dragonback saga—perfect for fans of fast-paced sci-fi and reluctant heroes.
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About the book
Jack Morgan never asked for a symbiotic dragon warrior as a tattoo—or a bodyguard—but now that Draycos has saved his life, Jack’s along for the ride. The dragonlike K’da is on a mission: uncover who wiped out his people’s refugee fleet, and stop them before they strike again.
To get answers, Jack joins a mercenary unit that recruits teens like him for dangerous missions. But boot camp is brutal, the rules are deadly, and not all the new recruits are who they claim to be. As Jack digs deeper, he uncovers a conspiracy that threatens not only Draycos’s people—but maybe the entire galaxy.
From the #1 New York Times–bestselling author of Star Wars: Thrawn, this action-packed second installment in the Dragonback saga crackles with danger, loyalty, and heart.
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Spock is dead.
Captain’s Blood (Star Trek)
Sci-Fi · First Contact · Space Exploration
Our take
Spock is dead. Assassinated on Romulus. The Federation can’t act, so James T. Kirk must. Joined by Jean-Luc Picard, Will Riker, and old friends, Kirk uncovers a conspiracy that threatens to tear the galaxy apart. Star Trek legend William Shatner delivers an epic tale of mystery, war, and sacrifice in this must-read adventure.
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About the book
The galaxy stands on the brink of chaos. The Romulan Star Empire is crumbling, and Ambassador Spock’s desperate attempt to reunify his people ends in tragedy—his shocking assassination at a peace rally. With the Federation unable to intervene without igniting war, only one man can uncover the truth: James T. Kirk.
Retired but never out of the fight, Kirk embarks on a dangerous mission to Romulus, aided by Jean-Luc Picard, Will Riker, and a few familiar faces. But as they navigate a web of treachery and war, Kirk discovers a threat greater than anyone imagined—one tied to an enemy from his past and a destiny he never saw coming.
A thrilling Star Trek adventure from William Shatner, this epic saga unites generations to fight for the fate of the galaxy.
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Branded a traitor, Connor wakes from stasis to find himself on a distant, untamed planet with 300,000 colonists hoping for salvation.
Genesis
Sci-Fi · Military Sci-Fi · Space Exploration
Our take
Branded a traitor, Connor wakes from stasis to find himself on a distant, untamed planet with 300,000 colonists hoping for salvation. But the new world hides treacherous secrets, and the mission that brought them here is steeped in lies. As danger closes in, Connor must fight to protect humanity’s fragile second chance—or watch it unravel.
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About the book
A mission gone wrong leaves Connor branded a traitor and thrust into stasis aboard Earth’s first interstellar colony ship, unprepared for what’s next.
For 300,000 hopeful colonists, this journey promises a fresh start. For Connor, it’s a second chance to prove his worth—if he can survive.
As they reach a new world filled with unknown dangers, Connor uncovers a chilling truth: the mission is far from what it seemed. Shadows of Earth’s mistakes linger, and survival demands more than anyone expected.
With the colony’s future hanging by a thread, Connor must become the unlikely hero they need—or risk losing everything.
In a world of shifting loyalties and hidden threats, will Connor’s redemption cost him his humanity?
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Perfect for readers of Marko Kloos and Tanya Huff.
Planetside
Sci-Fi · Space Exploration
Our take
A missing soldier. A war-torn planet. A conspiracy buried under enemy fire. Colonel Carl Butler is sent to investigate—but the deeper he digs, the deadlier the truth becomes. Explosive and razor-sharp, Planetside is a must-read for military sci-fi fans. Perfect for readers of Marko Kloos and Tanya Huff. Get your copy today!
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About the book
“Planetside is a smart and fast-paced blend of mystery and boots-in-the-dirt military SF that reads like a high-speed collision between Courage Under Fire and Heart of Darkness.” – Marko Kloos, bestselling author of the Frontline series
A seasoned military officer uncovers a deadly conspiracy on a distant, war-torn planet…
War heroes aren't usually called out of semi-retirement and sent to the far reaches of the galaxy for a routine investigation. So when Colonel Carl Butler answers the call from an old and powerful friend, he knows it's something big—and he's not being told the whole story. A high councilor's son has gone MIA out of Cappa Base, the space station orbiting a battle-ravaged planet. The young lieutenant had been wounded and evacuated—but there's no record of him having ever arrived at hospital command.
The colonel quickly finds Cappa Base to be a labyrinth of dead ends and sabotage: the hospital commander stonewalls him, the Special Ops leader won't come off the planet, witnesses go missing, radar data disappears, and that’s before he encounters the alien enemy. Butler has no choice but to drop down onto a hostile planet—because someone is using the war zone as a cover. The answers are there—Butler just has to make it back alive…
“Not just for military SF fans—although military SF fans will love it—Planetsideis an amazing debut novel, and I’m looking forward to what Mammay writes next.” – Tanya Huff, author of the Confederation and Peacekeeper series
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