Book picks similar to
A Galaxy Unknown by Thomas DePrima


science-fiction
sci-fi
space-opera
scifi

Conquerors' Pride


Timothy Zahn - 1994
    . . measures that Lord Cavanaugh has no choice but to defy.  He recruits Adam Quinn, who once flew with the elite Copperheads--fighter pilots whose minds are literally one with their machines--to rescue his son.  Quinn assembles a crack force of Copperheads to steal out of the Commonwealth security zone and snatch Pheylan Cavanaugh from the conquerors.  Depending on the outcome, Quinn and his men will retum home as heroes or as the galaxy's most despised traitors--if they come home at all.

The Stars Now Unclaimed


Drew Williams - 2018
    Her mission: to recruit children with miraculous gifts in the hope that they might prevent the Pulse from once again sending countless worlds back to the dark ages.Hot on her trail is the Pax--a collection of fascist zealots who believe they are the rightful rulers of the galaxy and who remain untouched by the Pulse.Now Jane, a handful of comrades from her past, and a telekinetic girl called Esa must fight their way through a galaxy full of dangerous conflicts, remnants of ancient technology, and other hidden dangers.And that's just the beginning . . .

The Cruel Stars


John Birmingham - 2019
    Fashioning themselves as the one true “Human Republic,” the Sturm cut a bloody swath across the stars, killing billions before finally being defeated and driven into the far reaches of Dark Space. Centuries of peace bred complacency. Everyone believed the Sturm had died out in the Dark. They were wrong.The enemy has returned and, with a brutal and decisive attack, knocks out almost all of humanity’s defenses. Now on the brink of annihilation, humankind’s only hope is a few brave souls who survived the initial attack: Commander Lucinda Hardy, thrust into uncertain command of the Royal Armadalen Navy’s only surviving warship. Booker3, a soldier of Earth, sentenced to die for treason, whose time on death row is cut short when the Sturm attack his prison compound. Princess Alessia, a young royal of the Montanblanc Corporation, forced to flee when her home planet is overrun and her entire family executed. Sephina L’trel, the leader of an outlaw band who must call on all of her criminal skills to resist the invasion. And, finally, Admiral Frazer McLennan, the infamous hero of the first war with the Sturm hundreds of years ago, who hopes to rout his old foes once and for all—or die trying.These five flawed, reluctant heroes must band together to prevail against a relentless enemy and near-impossible odds. For if they fail, the future itself is doomed.

Phule's Company


Robert Lynn Asprin - 1990
    than most people do all day. Threatened by an alien enemy, Earth's military sends Phule and his soldiers to a distant planet. But now, the aliens have chosen a new target of war . . . Phule's Company.

Forging Zero


Sara King - 2013
    Now they own us.The Legend of ZERO: Forging Zero is the epic journey of 14-year-old Joe Dobbs in a post-apocalyptic universe following a massive galactic empire's invasion of Earth. The oldest of the children drafted from humanity’s devastated planet, Joe is impressed into service by the alien Congressional Ground Force—and becomes the unwitting centerpiece in a millennia-long alien struggle for independence. Once his training begins, one of the elusive and prophetic Trith appears to give Joe a spine chilling prophecy that the universe has been anticipating for millions of years: Joe will be the one to finally shatter the vast alien government known as Congress. And the Trith cannot lie.…But first Joe has to make it through bootcamp.

Hammered


Elizabeth Bear - 2004
    Once she was somebody’s enemy. Now the former Canadian special forces warrior lives on the hellish streets of Hartford, Connecticut, in the year 2062. Racked with pain, hiding from the government she served, running with a crime lord so she can save a life or two, Jenny is a month shy of fifty, and her artificially reconstructed body has started to unravel. But she is far from forgotten. A government scientist needs the perfect subject for a high-stakes project and has Jenny in his sights. Suddenly Jenny Casey is a pawn in a furious battle, waged in the corridors of the Internet, on the streets of battered cities, and in the complex wirings of her half-man-made nervous system. And she needs to gain control of the game before a brave new future spins completely out of control.

The Ember War


Richard Fox - 2015
    Humanity has a chance. In the near future, an alien probe arrives on Earth with a pivotal mission—help humanity survive an impending invasion by an alien armada so massive it can blot out the stars, or leave the human race to certain extinction. Despite overwhelming odds, the probe recruits a young inventor named Marc Ibarra to plan a daring gambit. To weather the coming storm, Ibarra must build a space fleet strong enough to face an implacable foe in a battle against annihilation.

Starship: Mutiny


Mike Resnick - 2005
    A new first officer reports, Wilson Cole, a man with a reputation for exceeding his orders (but getting results). He's been banished to the Teddy R. for his actions, but once there he again ignores his orders. ...This is the first of five novels about the starship Theodore Roosevelt. The next four will be, in order, Pirate, Mercenary, Rebel, and Flagship.

Koban


Stephen W. Bennett - 2012
    Nearly unlimited cheap energy from tachyons led to the creation of Jump Hole technology and faster than light travel to the stars. In two hundred years, humanity had colonized over seven hundred planets in a volume five hundred light years in radius. Humankind enjoyed the benefits of the end of wars and disbanded its standing armies. Life was idyllic for three hundred years. Then the Krall came.The Krall, a warrior race with lightning-fast reflexes has used combat for 25,000 years to select the genes of the strongest and fastest warriors. This breeding program created a species fit to dominate the galaxy. Dominate everywhere but on Koban, an uninhabited planet with high gravity, teal colored flora and impossibly fast and savage animals that employ organic superconducting nerves.The Krall captured humans at the fringes of their expansion for testing on Koban. Humanity was useful only if they were adequate fighters. If not, the Krall intended to destroy the species because they already had slave races, and humans were poor tasting meat animals. If humans proved worthy opponents, the Krall would fight with the same weapons humans used, in order to continue their quest for physical perfection.Growing weary of the humans’ incapacity to fight well, the Krall were close to a decision to eliminate the race when they captured their last cargo of humans for testing – a ship containing bio-scientists. The choice was simple: Put up a good fight or condemn humanity to extinction. The Krall will discover more than one species knows how to bypass natural selection.

Into the Storm


Taylor Anderson - 2008
    Its captain, Lieutenant Commander Matthew Patrick Reddy, knows that he and his crew are in dire straits. In desperation, he heads Walker into a squall, hoping it will give them cover---and emerges somewhere else.Familiar landmarks appear, but the water teems with monstrous, vicious fish. And there appear to be dinosaurs grazing on the plains of Bali. Gradually Matt and his crew must accept the fact that they are in an alternate world---and they are not alone. Humans have not evolved, but two other species have. And they are at war.With its steam power and weaponry, the Walker's very existence could alter the balance of power. And for Matt and his crew, who have the means to turn a primitive war into a genocidal Armageddon, one thing becomes clear: They must decide whose side they're on. Because whoever they choose to side with is the winner.

Stardoc


S.L. Viehl - 2000
    Cherijo Grey Veil leaves Earth and accepts a position as a physician at Kevarzanga-2's FreeClinic. Her surgical skills are desperately needed on a hostile frontier world with over 200 sentient species--and her understanding of alien physiology is nothing short of miraculous. But the truth behind her expertise is a secret which, if discovered, could have disastrous consequences between human and alien relations...

Planetside


Michael Mammay - 2018
    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…

Grimspace


Ann Aguirre - 2008
    Then a crash landing kills everyone on board, leaving Jax in a jail cell with no memory of the crash. But her fun's not over. A group of rogue fighters frees her...for a price: her help in overthrowing the established order.

Into the Dark


J.A. Sutherland - 2014
    Her options are few. She must marry and watch a stranger run the lands, or become a penniless tenant and see the lands she so dearly loves sold off. Yet there may be another option, one that involves becoming a midshipman on a shorthanded spaceship with no other women.

Perilous Waif


E. William Brown - 2017
     When I was little I used to climb up to the highest branches of the housetree at night, and watch the starships docking at the orbital stations high above. Forty meters off the ground, watching ships thirty thousand kilometers overhead, with senses that could pick out radar pings and comm chatter as easily as the ships themselves. It all seemed perfectly natural at the time. There were other kids with mods at the orphanage, but nothing like that. I learned fast to downplay my abilities, keep my mouth shut and try to blend in. Even as a kid I knew not to trust the Matrons. What would they do, if they realized the Adjustments that were supposed to make me a meek little herd animal didn’t do anything? Then I messed up, and gave myself away. Now I’m on the run, hoping against hope that the Matrons won’t try too hard to find me. Hoping to survive all the awful things that can happen to a girl on her own in space. Kidnappers, slavers, pirates and yakuza - no matter where I go, trouble always seems to find me. Good thing I’m not as helpless as I look.