Looking for the best science fiction books for teens aged 10–14? Whether your young reader loves alien worlds, futuristic spaceships, or fast-paced galactic adventures, this list has something they won’t want to put down.
Discover 15 exciting sci-fi books for middle-graders—all packed with action, imagination, and unforgettable characters. Even better, these titles will be available FREE or just $0.99 from May 1–4, 2026, making it the perfect time to stock up their reading list.
Get the deals now! 👇
MAY 1-2: FREE / MAY 3-4: $0.99
IS SHE ANDROID OR MORTAL?
A piece of scrap. That’s how the townsfolk on Trinket’s planet label her. The twelve-year-old is determined to prove that she's more than just a discarded android, but her prosthetic leg and blue veins in her hands make her wonder about her true identity. Trinket knows that she must get off-world before the cruel and powerful Remnants send her to the scrap yard, but things take a turn for the worse when the Remnant Supreme Leader discovers her existence.
Trinket could be the key to a lost spaceship that is rumored to hold the greatest hoard of gems in the galaxy, and the Supreme Leader wants it. As the alien civilizations of the Magnus Star Cluster wake up to the possibility that the legendary treasure exists, a frantic hunt for the lost spaceship - and its key - pits Trinket against an enemy that will stop at nothing to get what they want.
To uncover the truth about her identity, Trinket must confront the evil Supreme Leader or get to the treasure first. But what if the truth is too shocking to bear?
Exostar is the first book in the bestselling, award-winning Lost Space Treasure Series, a rip-roaring upper middle-grade science fiction story with a cast of unforgettable characters—perfect for the space explorers of tomorrow.
⭐ "Nail-biting action and a courageous robot girl power this middle grade SF thriller." — BOOKLIFE
⭐ GRAND PRIZE WINNER of the 2023 Gertrude Warner Awards for Middle-Grade Fiction
⭐ For fans of Star Wars, Guardians of the Galaxy, and A Hitchhiker's Guide to the Galaxy.
MAY 1-4: $0.99
At the first coding academy on the moon, constant surveillance doesn’t stop the smartest misfits from plotting their escape—even if it costs them their freedom.
Life at the Lunar Coding Complex is boring, not that thirteen-year-old Moon Girl cares. She finds comfort in its predictability—her first real friend and her love of AI coding keep her anxiety in check. When a harmless prank with her charismatic bestie attracts the attention of rebel hackers led by Moon Girl’s crush Dovrin, she’s thrilled to join their crew. But as they uncover Big Smile Corp’s dangerous secrets, Moon Girl faces impossible choices: her friendship, her crush, or everyone’s safety. Even if they crack the system, do they want to escape back to Earth? And if they fail, what will the sinister corporation do to silence them?
A thrilling science fiction adventure for middle-grade readers from ages ten to adult.
MAY 1-4: $0.99
The alien invasion is upon us! At least, that’s what twelve-year-old Marv thinks when a mysterious craft appears in the woods behind his house. If there’s one thing he’s learned from his trusty alien invasion guidebook, it’s that ETs are just as likely to land in your backyard as they are on the front lawn of the White House.
A plot to take over the planet is the only logical explanation for what’s going on. Why else would a suited pilot chase Marv and his friends through the woods? What else could explain the creepy leech-like creatures attached to the hull of the ship? As if that wasn’t enough, the recently moved-in next-door neighbor girl and her dad seem to be directly connected to the alien conspiracy.
The National Guard won’t take his calls seriously. His family thinks he’s making everything up. Marv and his friends are on their own if they want to stop the invaders from Pluto—unless that mysterious red pickup truck that keeps driving by is somehow involved in all this, too.
But Marv is wrong. The threat is real, but the aliens aren’t. And getting mixed up with the wrong people might still result in an abduction…
An exciting science fiction thriller perfect for middle graders, with a mix of adventure and humor that is sure to keep readers young and old turning the pages until the exciting conclusion!
⭐ “A quirky, fun, intriguing story of suspense that will keep preteens on their toes…a vivid, action-packed adventure.” — Midwest Book Review
⭐ A 2025 IngramSpark Top Pick
⭐ For fans of Stranger Things, The Last Kids on Earth, Animorphs, and Goosebumps.
MAY 1-4: $0.99
I’m pretty sure I’m about to die in space. And I just turned twelve and a half.
Blast off with the four winners of the StellarKid Project on a trip to the International Space Station and then to the Gateway outpost orbiting the Moon! It’s a dream come true until space junk collides with the ISS, turning their epic trip into a nightmare of survival. Alone aboard the Aether starship, the kids have to work as a team to save the adults before the ISS is destroyed. Suit up, cadet, and launch into adventure with One Giant Leap!
⭐ “Relatable characters ground a story that's suspenseful, funny, and heartwarming.” —Kirkus Reviews
⭐ EDITOR'S PICK, Publishers Weekly
⭐ For fans of space, realistic science fiction, STEM, action, bravery, and heart-pounding adventure!
MAY 1-4: FREE
What if alien refugees were already living in Earth's oceans—and you were one of them?
Jake Rose can breathe underwater. That's not exactly normal for a seventh-grader living on Bainbridge Island, but then again, Jake isn't exactly normal. He's half-human, half-alien, with gills hidden beneath his shirt and a secret that could change everything.
His home planet Rison is dying—literally imploding from a science experiment gone catastrophically wrong. Jake's alien mother, Ambassador Dayexi Quad-de, is desperately negotiating with Earth's governments to let her people settle peacefully in the oceans. It should be simple: Risonians need water, Earth has plenty of it, and nobody gets hurt.
But someone wants to start a war instead.
When Jake stumbles upon a terrifying conspiracy to sabotage Mount Rainier and trigger a massive volcanic eruption, he realizes the truth: Earth's elite ELLIS forces plan to frame the peaceful Risonian refugees, turning them from desperate survivors into dangerous invaders. One fake alien attack is all it takes to justify a genocide.
Then Jake's mother disappears. Kidnapped. And suddenly, this isn't just about saving two worlds—it's about saving the only family he has left.
Armed with abilities that make him perfectly suited for both land and sea, Jake must navigate deadly government conspiracies, underwater alien technology, and the impossible choice between the planet that raised him and the planet that might become his home. Because when you're caught between two worlds, sometimes you're the only one who can save both.
Sleepers launches the pulse-pounding Blue Planets World series, where middle-grade adventure meets edge-of-your-seat science fiction. Perfect for fourth through eighth-grade readers ready for their next obsession.
MAY 1-4: $0.99
Ever wonder what else is out there? So does twelve-year-old Drew Shipley, a daydreamer whose only fear is growing up. To escape his present and avoid his future, Drew and his friends roam their small town playing night tag, fantasizing about aliens and spaceships, and exploring the haunted Gladhill barn. But Drew’s fantasies become reality when a starfighter from another dimension crashes in the cornfield behind his house: Sheela Vestril, commander of the Dimension Warriors and last hope in a galactic war to save their world from the vile Lord Malgore. As Drew learns more about Sheela, he and his friends band together to help her complete her mission and keep her a secret from their parents, a suspicious deputy, and a ruthless gang of bullies.
But this isn't a game, and Drew and his friends have no idea what they’ve signed up for. Who is this girl and what's chasing after her? Are Drew and his friends really cut out to save the universe? Is this Drew's chance to escape the realities of his life, or will those realities follow him no matter what galaxy he's in? Time is running out, and growing up is no longer a choice: It's a matter of life and death.
MAY 1-4: $0.99
A 10-year-old boy, exploding nebula, ghost ship, alien cemetery, and a beautiful world (except no one is there!). Will a regular boy with no super powers survive the dangers of space?
Rescued from starvation and homelessness, orphaned 10-year-old Karlson finds a new beginning with the "Star People" - space explorers who have arrived to save his planet.
He will have his bravery and tenacity tested leading up to becoming adopted by an officer of the starship "Seeker." Karlson's adventures will then take him from his home planet with his dad to explore distant worlds where beauty and danger await! He learns that honor, truth, respect, courage, kindness, and the love of his new family are his greatest adventures of all!
Star Man's Son series is perfect for preteens & teens who love space and adventure with a dash of science.
⭐ “A delightful well-told story from start to exciting surprise twist ending!” — Amazon Review
⭐ A Wishing Shelf Book Awards 2021 Finalist.
⭐ For fans of classic Sci-Fi (with no magic).
MAY 1-4: $0.99
Ruthless aliens. A gifted teenager. One chance to survive.
When fourteen-year-old Bryce Doubleday is captured by the Imjac, the alien conquerors of Earth, he knows he must fight to survive. Taken to an island prison camp, the ruthless aliens force him to work in the mines with other captives.
Soon, Bryce makes two discoveries: he has a special skill with alien technology, and the mines hold a substance that is toxic to the Imjac. Freedom still seems like an impossible dream. Alien guards constantly monitor the human slaves, and, worse, the island prison sits hundreds of miles from the mainland.
But when Bryce learns of a hidden danger, he must use his talent with alien tech to escape from the prison. Or die trying.
⭐ "The Escapers is a page turner, and not just for young adults or Sci-fi lovers. Picked up this book and could not put it down, can’t wait to read the next book in the series!" — Amazon reviewer
⭐ 2022 Wishing Shelf Book Awards Finalist
⭐ For fans of The Maze Runner, The Hunger Games, and Nyxia
MAY 1-4: $0.99
Living on Mars seems a lot like living on Earth. That is, until twelve-year-old Elliot makes a discovery that may hold the key to one of humanity’s biggest questions: Are we alone in the universe?
Life in a Martian colony can be tough! You can’t just go outside to hang out because, well, you’d suffocate and die.
Elliot lives a regular Martian life. He goes to school, plays football, and tries to avoid the mean kids. But he never gets to leave the colony buildings. That is, until he goes on a science trip where he makes a discovery that could change the course of humanity forever: a strange doorway in a volcanic cave! Who put it there? What’s on the other side?
Join Elliot and his friends as their lives go from the ordinary to the extraordinary. The solar system as we know it will never be the same again.
Diary of a Martian is the award-winning first book in a series for fans of action, adventure and science fiction. You’ll love this series that combines fast-paced action, down-to-earth characters and settings that are out of this world.
⭐ For fans of Star Trek, Artemis Fowl and Percy Jackson - But set on Mars!
MAY 1-4: FREE
A duo of teens are ready to take on formidable foes with courage, ingenuity, and a little help from the universe. But can they find their way home?
When a dragon-snake slithers into the lab where fifteen-year-old Jas volunteers, he and his artsy rival teleport to an exoplanet to rescue the alien life form’s son. Now, the Interplanetary Space Agency is determined to stop them. Can Jas make amends for his baby sister’s death? With water scarce and few comforts of home, the would-be-heroes find themselves up against a deadly enemy.
Will they overcome obstacles together or be stranded on this dusty planet light years from Earth?
⭐ "The kind of experience we all yearn for when we look at the stars and imagine distant planets." — Goodreads review
⭐ Named best book for schools and libraries
⭐ For fans of A Wrinkle in Time, Lost in Space reboot, and Percy Jackson.
MAY 1-4: $0.99
He’s the only one who can fix the splintered sphere in the sky. But first, he must unlock the truth buried inside himself…
Rieden Reece never expected the universe to come knocking. Dealing with a typical thirteen-year-old life is bad enough, but the troubled boy navigates school bullies, a divorced mom he needs to protect, and an absent dad. But when one night his bedroom shakes violently, he peers out his window and watches in stunned disbelief as the moon up above breaks apart.
Alarmed when a shadowy figure climbs out of the cracked orb, Rieden is shocked when the quirky alien reveals he’s been sent from the future to help him find something mission-critical. And now thrust into an epic battle against immense evil powers, unstoppable enemies, and scary black hole faces, the determined teen fears all worlds are on the brink of collapse.
Can one average youth save an entire universe from a countdown to catastrophe?
Rieden Reece and the Broken Moon is the thrilling first book in the Rieden Reece middle grade science fiction series. If you or your child like captivating characters, exhilarating flights of fantasy, and finely crafted suspense, then you’ll love Matt Guzman’s action-packed adventure.
⭐ "If you enjoy Chris Van Allsburg, Rod Serling, Lewis Carroll, J.D. Salinger, the movie Arrival or all of the above, you’ll enjoy this book. It’s a luminous read and a feast for the imagination!” — Kristine L., Netgalley Reviewer
⭐ For fans of Rick Riordan’s Percy Jackson, this is The Neverending Story meets the Twilight Zone.
MAY 1-4: $0.99
What if our universe contained dozens of parallel Earths — and one scarred sixteen-year-old was the only thing standing between them and total destruction?
Agnes Cavanaugh has spent her whole life being underestimated. Between her burn scars, her chronic pain, and her habit of reading dead languages for fun, she's used to being the odd one out. But when she accidentally activates an ancient alien tablet, she gets ripped through a dimensional portal into a parallel world — one with wizards, monsters, and a civilization five thousand years more advanced than ours.
Turns out the multiverse has a problem. Someone is draining the magic that holds worlds together. And Agnes, the girl who thought she was nobody, has a power no one has seen in millennia: she can detect any lie, in any language, spoken by any being in any world.
She didn't ask to be the most important person in the universe. But the universe didn't ask her either.
A complete five-book sci-fi fantasy series. Perfect for readers who love parallel worlds, unlikely heroes, and the idea that science and magic might just be the same thing.
⭐"The narrative was intense, the pace was fast, and the characterization was on point… I simply loved First Earth! Brilliant!" — Rabia Tanveer, Reader's Favorite
⭐ Readers' Favorite International Bronze Medal
⭐ For fans of Percy Jackson, The Lunar Chronicles, and underdog heroes discovering their power.
MAY 1-4: $0.99
Aliens. A notebook. A secret no one will believe.
Charlie Baker is 12 years old, dreams of being a reporter, and uses a wheelchair to get around her small town—with her loyal dog Sandy never far from her side. When Charlie stumbles across a crashed alien ship near Roswell, everything changes.
Now Charlie has a chance to write the story of a lifetime—but telling the truth might put the aliens in danger. With the military closing in and only her instincts, her notebook, and a very good dog to rely on, can she keep their secret?
Features a strong girl protagonist, positive disability representation, and a hopeful vision of first contact. Wholesome adventure with mild violence and peril; suitable for classrooms, and readers aged 9-13.
⭐ "Really enjoyed this kids' sci-fi story." — Verified Amazon Purchase, 5 stars
⭐ Part of the Earth's Secret Alliance franchise, which has sold over 13,600 copies and logged 112,000+ Kindle pages read.
⭐ For fans of E.T., Crater, and Star Trek: Prodigy
MAY 1-4: $0.99
When a misaligned AI makes Earth unreachable, families on the Moon must make a hard choice. Parents in two competing bases try to save their children by sending them to Mars on an aging spaceship, a journey that will take longer than supplies will last. As food runs out, the social order crumbles and factions form. Keiron Byrne (12 year old cousin to series protagonists Cas and Ori Byrne-Alli), Ro Cook (14 year old crush, bully, and eventual nemesis of Keiron), and Jun Tian (12 year old prodigy from the opposing base who has a secret that might save them all) must navigate starvation, racism, betrayal, and a ship that is beginning to behave very oddly.
Food is a fast-paced space adventure for advanced middle grade readers that asks what it means to be human. This book reads perfectly well as a standalone or an entry-point for the series and is enjoyable by readers of all ages.
⭐ "The action and suspense hit hard from the outset and never let up, but this book also tackles so much more." — Robert Cooper (Showrunner of Stargate SG-1, Stargate Atlantis, Stargate Universe and Dirk Gently’s Holistic Detective Agency)
⭐ Food is a fast-paced space adventure for advanced middle grade readers that asks what it means to be human. This book reads perfectly well as a standalone or an entry-point for the series and is enjoyable by readers of all ages.
⭐ For fans of The Expanse, Project Hail Mary, and The Long Way to a Small, Angry Planet.
MAY 1-4: $0.99
Intergalactic forces of darkness are on the hunt, and they’ll stop at nothing to reclaim their stolen treasure.
In this Christian adventure, Daniel was just looking forward to a quiet two weeks with his cousin Lucas, while his parents sorted out the tragedy of their home destroyed by fire. But when Lucas’s computer blares an emergency call, Daniel is pulled into a life he never imagined: one filled with real spaceships, alien spaceports, and high-stakes missions.
Daniel soon discovers his cousin is a starship pilot. Before he can process the truth, Daniel is whisked into space, joining Lucas on a mission to protect a mysterious alien ambassador and his precious briefcase. What’s inside? No one knows, but it’s valuable enough to paint a target on their backs. Racing through the galaxy’s underworld, dodging lasers in gritty spaceports, and surviving alien cantinas full of danger, Daniel begins to realize this adventure is bigger than anything he’s ever imagined.
When a mysterious Man of Wisdom invites Daniel to go deeper, he faces a choice: return to the safety of his old life or embrace a destiny where unseen forces of good and evil collide—and where his choices matter more than he ever dreamed.
Book 1 of the I Fly Spaceships series introduces an action-packed adventure full of danger, discovery, and heart. Perfect for fans of fast-paced sci-fi with a deeper message, this series reveals that unseen forces—both good and bad—are always at work in the background of our lives.
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Ready to explore new worlds? These science fiction books for teens are only FREE or $0.99 for a limited time (May 1–4, 2026), so don’t miss out.
Browse the full collection and grab your favorites before the deals disappear.
Reading age: 10–14
Reading level: Middle-grade
Themes: Space, spaceships, the Moon, Mars, aliens, planets, adventure