Zenith by Sasha Alsberg
The all-girl crew of the starship Marauder is tested by a bounty hunter from their powerful mercenary leader's past; while across the galaxy, a ruthless tyrant waits in the shadows to exact revenge for the destruction of her people.
Avalon by Mindee Arnett
Seventeen-year-old Jeth Seagrave, the leader of a ragtag team of teenage mercenaries, skirts the line between honor and the law in an attempt to win freedom for his sister and himself in the form of their parents' old spaceship, Avalon.
Dove Arising by Karen Bao
On a lunar colony, fifteen-year-old Phaet Theta does the unthinkable and joins the Militia when her mother is imprisoned by the Moon's oppressive government.
Empress of a Thousand Skies by Rhonda Belleza
When their paths cross after a brutal attack Aly is falsely accused of making on Rhee, they are forced to work together to save their own lives and the universe.
Waste of Space by Gina Damico
Cram ten hormonal teens into a spaceship and blast off: that's the premise for the ill-conceived reality show Waste of Space. The kids who are cast know everything about drama--and nothing about the fact that the production is fake.
Salvage by Alexandra Duncan
Ava, a teenage girl living aboard the male-dominated, conservative deep space merchant ship Parastrata, faces betrayal, banishment, and death. Taking her fate into her own hands, she flees to the Gyre, a floating continent of garbage and scrap in the Pacific Ocean. How will she build a future on an Earth ravaged by climate change?
The Disasters by M.K. England
Nax and a handful of other space Academy washouts are the only surviving pilots after the school is hijacked by terrorists, but in order to spread the truth about the attack, Nax and his fellow failures must execute a dangerous heist.
Defy the Stars by Claudia Gray
Teenaged soldier Noemi and an enemy robot, Abel, who is programmed to obey her commands, set out on an interstellar quest to save her home planet, Earth colony Genesis.
172 Hours on the Moon by Johan Harstad
In 2019, teens Mia, Antoine, and Midori are selected by lottery to join experienced astronauts on a NASA mission to the once top-secret moon base, DARLAH 2, while in a Florida nursing home, a former astronaut struggles to warn someone of the terrible danger there.
When the Sky Fell on Splendor by Emily Henry
Seventeen-year-old Franny and her friends, The Ordinary, fill their time in traumatized Spendor, Ohio, filming their investigations of local legends for YouTube, but when they investigate a cosmic event, everything changes.
The Loneliest Girl in the Universe by Lauren James
Stranded on a spaceship speeding away from Earth, Romy is euphoric when she gets word that she will soon be joined by another ship, but as the Eternity gets closer, Romy begins to suspect that the captain has a mission all of their own.
What Goes Up by Katie Kennedy
Rosa and Eddie are among hundreds of teens applying to NASA's mysterious Interworlds Agency. They're not exactly sure what the top-secret program entails, but they know they want in. Rosa has her brilliant parents' legacies to live up to, and Eddie has nowhere else to go--he's certainly not going to stick around and wait for his violent father to get out of jail. Even if they are selected, they have no idea what lies in store. But first they have to make it through round after round of crazy-competitive testing. And then something happens that even NASA's scientists couldn't predict
Insignia by S.J. Kincaid
Tom, a fourteen-year-old genius at virtual reality games, is recruited by the United States Military to begin training at the Pentagon Spire as a Combatant in World War III, controlling the mechanized drones that do the actual fighting off-planet.
Sequels: Vortex, Catalyst
Mirror in the Sky by Aditi Khorana
Tara, an Indian-American junior at Brierly prep school, feels her world dramatically change when a mirror planet to Earth is discovered and she, in this new era of scientific history, reconsiders her self and possible selves.
The planet Kerenza is attacked, and Kady and Ezra find themselves on a space fleet fleeing the enemy, while their ship's artificial intelligence system and a deadly plague may be the end of them all.
(We also recommend the Illuminae trilogy, also written by Amie and Jay, Unearthed, and the Starbound trilogy, both of which are by Amie and Meagan Spooner. Basically anything with Kaufman's name attached to it is sci-fi gold.)
Satellite by Nick Lake
Born and raised on Moon 2, Leo and the twins, Orion and Libra, are finally old enough and strong enough to endure the dangerous trip to Earth. They've been parented by teams of astronauts since birth and have run countless drills to ready themselves for every conceivable difficulty they might face on the flight. But has anything really prepared them for life on terra firma?
Starflight by Melissa Landers
Former high school enemies Solara Brooks and Doran Spaulding must team up when they find themselves aboard a renegade spaceship.
The Final Six by Alexandra Monir
Surrounded by strangers all competing for one of the six slots to travel to Jupiter's moon, Europa, Naomi, an Iranian-American science genius, finds a friend in Leo, an Italian championship swimmer, as the training tests their limits.
Starglass by Phoebe North
For all of her sixteen years, Terra has lived on a city within a spaceship that left Earth five hundred years ago seeking refuge, but as they finally approach the chosen planet, she is drawn into a secret rebellion that could change the fate of her people.
Nyxia by Scott Reintgen
Emmett accepts an interstellar space contract but learns en route that to win the promised fortune he and nine other recruits face a brutal competition, putting their very humanity at risk.
Across the Universe by Beth Revis
Seventeen-year-old Amy joins her parents as frozen cargo aboard the vast spaceship Godspeed and expects to awaken on a new planet 300 years in the future, but 50 years before the ship's scheduled landing, Amy is violently woken from her frozen slumber.
Sequels: A Million Suns, Shades of Earth
Zodiac by Romina Russell
When a violent blast strikes the moons of Cancer, sending its ocean planet off-kilter and killing thousands of citizens, Rhoma Grace, a sixteen-year-old student from House Cancer, must convince twelve worlds to unite as one Zodiac against Ophiuchus, the exiled thirteenth Guardian of Zodiac legend, who has returned to exact his revenge across the Galaxy.
Sequels: Wandering Star, Black Moon, Thirteen Rising
The 5th Wave by Rick Yancey
Cassie Sullivan, the survivor of an alien invasion, must rescue her young brother Sam from the enemy with help from a boy named Evan walker, who may be one of them.
Sequels: The Infinite Sea, The Last Star
Here's some good non-fiction too:
American Moonshot by Douglas Brinkley
July 20, 1969. It's a day that has earned a spot in history. It's the day that America was the first nation to succeed in sending two astronauts--Buzz Aldrin and Neil Armstrong--to the moon. But what led to this unforgettable event? What were the stakes riding on the Apollo 11's safe landing? In acclaimed author Douglas Brinkley's first young readers' edition, space fans will get the riveting and factual backstory of arguably the most significant achievement of the 20th century.
Endurance by Scott Kelly
Astronaut Scott Kelly takes readers on a journey through his year aboard the International Space Station and his life prior to becoming a true American hero.
Startalk by Neil deGrasse Tyson
Tyson looks at the most confounding mysteries of Earth, space, and what it means to be human. He attempts to answer all of your most pressing questions, from how the brain works to the physics of comic book superheroes.
If you want to try crossing over into some titles for adults instead of YA, may we recommend...
Sphere by Michael Crichton
A group of American scientists are rushed to a huge vessel that has been discovered resting on the ocean floor in the middle of the South Pacific. What they find defies their imaginations and mocks their attempts at logical explanation. It is a spaceship of phenomenal dimensions, apparently, undamaged by its fall from the sky. And, most startling, it appears to be at least three hundred years old...
The Martian by Andy Weir
When a dust storm forces his crew to evacuate the planet while thinking him dead, astronaut Mark Watney finds himself stranded on Mars's surface, completely alone. Armed with nothing but his ingenuity, his engineering skills--and a gallows sense of humor that proves to be his greatest source of strength--Mark embarks on a dogged quest to stay alive, but will his resourcefulness be enough to overcome the impossible odds against him?
Artemis by Andy Weir
Augmenting her limited income by smuggling contraband to survive on the Moon's wealthy city of Artemis, Jazz agrees to commit what seems to be a perfect, lucrative crime, only to find herself embroiled in a conspiracy for control of the city.