Books like 'Lacuna'

Readers who enjoyed Lacuna by David Adams also liked the following books featuring the same tropes, story themes, relationship dynamics and character types.

sc-fi space action / adventure military, war & conflict space-opera war military aliens apocalyptic post-apocalyptic

Mage-Commander by Glynn Stewart
Rated: 4.55 of 5 stars
· 20 ratings
Some soldiers are the shields of innocent soulsOthers are the fanatics of their causeAnd for them…no war is ever truly over!Tempered on the anvil of the war against the secessionist UnArcana Worlds and tested against the evil of Project Orpheus, Mage-Commander Roslyn Chambers has risen through the ranks of the Royal Martian Navy to serve as second-in-command of one of their most prestigious...

Categorized as:
aliens exploration invasion military space-fleet space-opera space-travel war
The Colossus by Jay Allan
Rated: 4.50 of 5 stars
· 10 ratings
The Hegemony strikes again… The Confederation and its allies have won their first victory, retaken their capital from he forces of the Hegemony. But the enemy is not beaten, far from it, and they are back, with an unstoppable weapon, a vast superbattleship, a deadly hybrid of imperial and Hegemony technology, called the Colossus...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
Delphi Colony by Bob Blanton, Jessica Gurd
Rated: 4.42 of 5 stars
· 12 ratings
Book 8 of the popular series Delphi in Space. The McCormacks are finally going to start an Earth Colony and the Paraxeans are finally getting a home. Catie is going to the Academy and Marc is going to Artemis...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
Delphi Challenge by Bob Blanton, Jessica Gurd
Rated: 4.42 of 5 stars
· 12 ratings
Book 9 of the popular series Delphi In Space Delphi. In it, we find the McCormacks having to defend Artemis from the same Aliens that attacked the Paraxean colony fleet over 70 years before. Follow along as Catie finally graduates from the Academy...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
Nua'll by S.H. Jucha
Rated: 4.42 of 5 stars
· 12 ratings
The Omnian expeditionary fleet sails for the faraway place they call “the wall.” The worlds of humankind have consolidated their resources to create a powerful armada to confront the alien federation.During the Omnians’ previous encounter with an alien fleet at the wall, the Nua’ll comm sphere spoke to them in multiple languages...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
Delphi Diversion by Bob Blanton
Rated: 4.42 of 5 stars
· 12 ratings
Catie is on her way back to Earth after having settled the Fazulan slaves when the wormhole her ship is traveling in collapses. They are diverted to another system where big chunks are flying around. They rescue a ship and find themselves in the middle of a series of mysteries...

Categorized as:
aliens exploration first-contact military space-fleet space-opera space-travel action-adventure
Rising Force by Ken Lozito
Rated: 4.42 of 5 stars
· 12 ratings
Eight months have passed since the Star Shroud barrier was engaged to protect the Earth, but it won’t last, and humanity is scrambling to build a fleet. Cut off from home, the crew of the Athena has taken refuge on the Boxan colony world, a last safe haven for the creators of the Star Shroud...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
The Grand Alliance by Jay Allan
Rated: 4.42 of 5 stars
· 12 ratings
Hell is Unleashed The Hegemony controls Megara, the Confederation’s capital. War has raged for five years. Millions are dead, vast fleets of ships have been destroyed. But in the stronghold where Tyler Barron and his comrades have gathered their allies and the last of their strength, a plan is being devised...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
Duchess of Terra by Glynn Stewart
Rated: 4.42 of 5 stars
· 26 ratings
When Terra knelt to an alien Imperium They guaranteed our safety and our future But now their enemies are coming for us To preserve humanity’s survival and freedom in a hostile galaxy, Annette Bond tied her world to the A!Tol Imperium, taking on the mantle of Duchess of Terra to rule humanity in the Imperium’s name...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
Kinetic Strike by Rick Partlow
Rated: 4.41 of 5 stars
· 25 ratings
The war made him a hero. Now the Marines need him to be a leader.Cam Alvarez is a Drop-Trooper. A warrior-knight wrapped in the futuristic armor of a high-tech battlesuit, and he’s one of the best. When he’s promoted to sergeant and asked to become a leader, he faces a whole new challenge. The Marines are striking deep into enemy territory and the casualties are mounting...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
Terra and Imperium by Glynn Stewart
Rated: 4.44 of 5 stars
· 23 ratings
Secrets both ancient and new. Powers great and greater— With Terra caught in the middle Humanity’s first colony is a project neither the Duchy of Terra nor the A!Tol Imperium can allow to fail. The planet Hope in the Alpha Centauri system has been lavished with resources and attention—but when an unknown alien force attacks the system, all of that is in danger...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
The Terran Privateer by Glynn Stewart
Rated: 4.31 of 5 stars
· 16 ratings
Earth is conquered. Sol is lost. One ship is tasked to free them. One Captain to save them all. When an alien armada destroys the United Earth Space Force and takes control of the human homeworld, newly reinstated Captain Annette Bond must take her experimental hyperspace cruiser Tornado into exile as Terra’s only interstellar privateer...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
Junkyard Spaceship by Jamie McFarlane
Rated: 4.46 of 5 stars
· 21 ratings
When aliens threaten his country, one grumpy old vet will take the fight to the stars.Albert Jenkins would like nothing more than to putter around his junkyard, selling parts and working on old cars. When an alien spacecraft is shot down by US Air Defense and crash lands on his newly rebuilt home, he’s dragged back into the fight of his life...

Categorized as:
aliens exploration first-contact invasion military space-opera space-travel action-adventure
Darkness Beyond by Glynn Stewart
Rated: 4.41 of 5 stars
· 24 ratings
A newly-founded human colony world burned from orbit A warship squadron of the galaxy’s oldest race ambushed and destroyed An ancient enemy reborn in the darkness beyond the known stars The A!Tol Imperium and their new human subjects have had fifteen years of relative peace. New colonies have been founded, new worlds explored, new ships built...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
Danger Close by Rick Partlow
Rated: 4.39 of 5 stars
· 24 ratings
All Cam Alvarez has known is war.For three years, he’s fought the marauding alien Tahni on one God-forsaken planet after another, leading a squad of armored Drop Troopers.But the war is about to change.Cam is an officer now, fresh out of OCS and taking charge of his old platoon, and things have reached a tipping point...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
Shield of Terra by Glynn Stewart
Rated: 4.45 of 5 stars
· 20 ratings
The mother, ruler of an entire world Sent to the heart of an old enemy to build a new peace The daughter, officer of a deadly warship Sent to the darkness to find the new enemy hunting them all A dozen inhabited worlds of the Kanzi Theocracy and the A!Tol Imperium are ash...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
Crusade by Glynn Stewart
Rated: 4.40 of 5 stars
· 10 ratings
A newborn Alliance, forged to stop the destroyers of worldsA potential ally, with secrets hidden by a thousand liesA long-doomed star, whose ruins hold a vital answer...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
Galactar by Anthony James
Rated: 4.40 of 5 stars
· 10 ratings
Following decades of war and the recent catastrophic loss of an entire planet, the Human Planetary Alliance is riven by internal disputes and rivalries. The military’s old guard fights for power against those who see a chance to turn things around.After a series of hard-fought victories, Captain Carl Recker is becoming recognized as a man who gets results - a man who knows how to beat the Daklan...

Categorized as:
aliens exploration invasion military space-fleet space-opera space-travel action-adventure
Fulcrum Gun by Anthony James
Rated: 4.40 of 5 stars
· 10 ratings
Lost in hostile space and pursued by the most powerful warship in the known universe, Captain Carl Recker is losing hope and running out of options. His battleship Fulcrum is no match for this enemy and the Meklon aliens who might have helped him are dead, killed by the Galactar’s murderous weaponry.Somehow, Recker must find a way to succeed where the might of an alien empire already failed...

Categorized as:
aliens exploration invasion military space-fleet space-opera space-travel action-adventure
Winds of Vengeance by Jay Allan
Rated: 4.40 of 5 stars
· 10 ratings
Earth Two. A new home for the survivors of the fleet, the men and women who battled against seemingly insurmountable odds to survive the assault of the First Imperium and to destroy the homicidal Regent, the artificial intelligence committed to their destruction...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
Laws of Ancidium by Anthony James
Rated: 4.40 of 5 stars
· 10 ratings
Having fought his hardest battle, Captain Carl Recker returns to planet Lustre, bringing the alien battleship Fulcrum with him.Recker is under no illusions that he’ll be offered backdated shore leave, but his feet don’t even touch the ground before trouble shows up. A heavily armed fifty-thousand-metre Meklon interstellar drops out of lightspeed near the planet...

Categorized as:
aliens exploration invasion military space-fleet space-opera space-travel action-adventure
Family Law by Mackey Chandler
Rated: 4.40 of 5 stars
· 10 ratings
People love easily. Look at most of your relatives or coworkers. How lovable are they? Really? Yet most have mates and children. The vast majority are still invited to family gatherings and their relatives will speak to them. Many have pets to which they are devoted. Some even call them their fur-babies...

Categorized as:
aliens first-contact invasion military space-fleet space-opera action-adventure adult
The Dark Invaders by Raymond L. Weil
Rated: 4.40 of 5 stars
· 10 ratings
From USA Today Best Selling Author Raymond L. Weil comes the second book in the Star Cross series. Over fourteen months have passed since Fleet Admiral Kurt Vickers drove the Profiteers from Earth. Eighty million people died while the planet was being ransacked and its wealth stolen. Now a new and deadlier threat comes from intergalactic space...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
The Long Voyage of the Little Fleet by Mackey Chandler
Rated: 4.40 of 5 stars
· 10 ratings
In the first book of this series "Family Law", Lee's parents and their business partner Gordon found a class A habitable planet. They thought their quest as explorers was over and they'd live a life of ease. But before they could return and register their claim Lee's parents died doing a survey of the surface...

Categorized as:
aliens exploration first-contact military space-fleet space-opera space-travel action-adventure
Refuge by Glynn Stewart
Rated: 4.36 of 5 stars
· 11 ratings
A dying world, shattered by a broken machineA desperate flight, their only hope for refugeA robotic race, ally and destroyer alikeThe Republic of Exilium has grown in strength and confidence at the far end of the galaxy from the rest of mankind, sending out scout ships to survey the worlds around them as they try to learn more about the mysterious Construction Matrix AIs...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
Relics of Eternity by Glynn Stewart
Rated: 4.33 of 5 stars
· 12 ratings
The edge of Imperial expansionFar from Earth and the other homeworldsHere lie the secrets of ancient godsHere…there be dragonsSeeking to escape the shadow of Annette Bond’s success, Captain Morgan Casimir has taken a posting on the far side of the A!Tol Imperium. Here, she hopes to begin a legend for herself that stands apart from her stepmother the Duchess...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
Omnia by S.H. Jucha
Rated: 4.33 of 5 stars
· 12 ratings
Alex Racine, who led an elite group of humans and SADEs (self-ware digital entities), left the newly discovered planet of Celus-5 under difficult circumstances. Few of the Harakens with Alex thought there was little he could do to bring peace to the embroiled planet...

Categorized as:
aliens exploration first-contact invasion military space-opera space-travel action-adventure
Celus-5 by S.H. Jucha
Rated: 4.33 of 5 stars
· 12 ratings
For the Sojourn’s initial mission, the Haraken explorer ship undertakes the investigation of Celus-5, a world identified by Willem, a SADE (self-aware digital entity), and his team of scientists, as the best prospect for a new colony.What should be a routine survey mission becomes a disaster. To the Harakens’ surprise, they discover, not one, but two alien species engaged in conflict...

Categorized as:
aliens exploration first-contact invasion military space-opera space-travel action-adventure
Fracture by Ken Lozito, Scott Aiello
Rated: 4.33 of 5 stars
· 12 ratings
Colonel Sean Quinn is stranded in another universe, along with two thousand people under his command. They've been hiding from the enemy long enough, now it’s time to return home. Outnumbered against a superior foe, Sean must risk everything in a daring operation, but the mysterious enemy has a few surprises of their own...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
Direct Fire by Rick Partlow
Rated: 4.41 of 5 stars
· 21 ratings
From street criminal to war hero.From outcast to Marine officer.The journey has been a long one, but now it’s reaching the end.Cam Alvarez leads his platoon of Drop-Troopers into the Tahni Imperium, into the final days of the war and the bloodiest battles yet...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
Exile by Glynn Stewart
Rated: 4.31 of 5 stars
· 13 ratings
A shackled Earth, ruled by an unstoppable tyrantAn exiled son, and a one-way trip across the galaxyA perfect world, their last hope for survivalVice Admiral Isaac Gallant is the heir apparent to the First Admiral, the dictator of the Confederacy of Humanity. Unwilling to let his mother's tyranny stand, he joins the rebellion and leads his ships into war against the might of his own nation...

Categorized as:
aliens exploration invasion military space-fleet space-opera space-travel war
Imperium Defiant by Glynn Stewart
Rated: 4.42 of 5 stars
· 20 ratings
The enemy promises conflict and annihilation.Their allies threaten betrayal and devastation, a daughter of Earth raises the call of defiance and the Imperium has never knelt!When the Taljzi’s genocidal invasion brought promises of aid from the oldest and greatest of the Core Powers, humanity and the Imperium looked to the Mesharom for salvation...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
Emergence by Ken Lozito, Scott Aiello
Rated: 4.29 of 5 stars
· 14 ratings
As the colony grapples with the realization that New Earth is not as uninhabited as they’d once thought, tensions between the colonial settlements rise to new heights, and the Colonial Defense Force finds itself caught in the middle. When Connor uncovers evidence of a militant colonial faction secretly exploiting the NEIIS, he has to investigate...

Categorized as:
aliens exploration first-contact invasion military space-opera space-travel war
Blood World by B.V. Larson
Rated: 4.25 of 5 stars
· 16 ratings
A dirty deal was struck. Humanity was allowed to keep three hundred rebellious worlds. In return, we declared war on a powerful enemy from beyond the frontier. A frantic build-up of forces has begun, but the task is hopeless. Seeking allies, Earth’s legions are sent to BLOOD WORLD. A planet on the fringe of known space, where the people only respect masters of combat...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
The Others by Jay Allan
Rated: 4.46 of 5 stars
· 17 ratings
From the deepest darks of unknown space, evil comes… Admiral Tyler Barron and the Confederation navy face a new threat, darker and deadlier than any that have come before...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
Corruption by Sarah Noffke, Michael Anderle
Rated: 4.50 of 5 stars
· 6 ratings
A new evil lurks in the darkness. After an explosion, the crew of a battlecruiser mysteriously disappears.Bailey and Lewis, complete strangers, find themselves suddenly onboard the damaged ship. Lewis hasn’t worked a case in years, not since the final one broke his spirit and his bank account. The last thing Bailey remembers is preparing to take down a fugitive on Onyx Station...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
Stardust by Edward W. Robertson
Rated: 4.50 of 5 stars
· 6 ratings
The invaders have arrived. The last battle for humanity is about to begin. STARDUST is the final book in the Rebel Stars series...

Categorized as:
aliens exploration first-contact invasion space-opera space-travel action-adventure adult
The Prisoner of Eldaron by Jay Allan, Mark Boyett
Rated: 4.38 of 5 stars
· 8 ratings
The Search for Erik Cain...The Superpowers of Earth have fought their final war, leaving Earth a devastated ruin, populated only by scattered groups of survivors living in primitive squalor. Out in space, however, humanity moves forward, and the former colonies of Earth's dead nations are now free from the yoke of the despotic governments that had long ruled over them...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
Empires in Ruin by Anthony James
Rated: 4.38 of 5 stars
· 8 ratings
Protected by their energy shields, the Lavorix warships Aeklu and Verumol survived the largest explosion ever created by technology. Now salvaged by the Human Planetary Alliance and their new Daklan allies, these once unstoppable weapons of mass destruction sit in a construction yard undergoing extensive repairs...

Categorized as:
aliens exploration invasion military space-fleet space-opera space-travel action-adventure
Delphi Envoy by Bob Blanton
Rated: 4.38 of 5 stars
· 8 ratings
Catie finally gets to go visit all the other civilizations known to the Paraxians. She is supposed to get them to join the Delphi League. But things don't go as smoothly as she expects. For some reason, there's resistance to anything she does. Come along and help Catie uncover the secrets on Aperanje...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-travel action-adventure
Tides of War by M.R. Forbes
Rated: 4.30 of 5 stars
· 10 ratings
After being saved from annihilation by the Old Gator’s daring plan, Gabriel and the crew of the Magellan find themselves in the most unlikely of places: a captured enemy starship. While learning to control the alien vessel introduces a new set of challenges, the secrets they discover within may prove to be the edge they so desperately need...

Categorized as:
aliens apocalyptic first-contact invasion military post-apocalyptic space-fleet space-opera
Weapons of War by M.R. Forbes
Rated: 4.30 of 5 stars
· 10 ratings
In the year 2280, an alien fleet stole our Earth. For fifty years they hunted us. For fifty years they enslaved us. For fifty years we lived in fear. Nothing lasts forever. They can try to quell us. They can try to break us. They can chase us to the ends of the Earth. They can chase us to the ends of the Universe. We’ve won our first battle. We’ve earned our first taste of hope...

Categorized as:
aliens apocalyptic first-contact invasion military post-apocalyptic space-fleet space-opera
The Alliance by Raymond L. Weil
Rated: 4.30 of 5 stars
· 10 ratings
A mission to free a world from the Kleese has gone terribly wrong. Lieutenant Ryan Nelson and his Marines are trapped with no hope of rescue. On the Kleese home world, a division grows between the regular Kleese and the militaristic Zaltule. The war against the Kleese intensifies as the human led Alliance attempts a daring attack against the heart of the Kleese Empire...

Categorized as:
aliens exploration first-contact invasion military post-apocalyptic space-fleet space-opera
Insurrection by Raymond L. Weil
Rated: 4.30 of 5 stars
· 10 ratings
The final battle between the Humans and the Zaltule is drawing near. However, the Arachnids have a secret that will ensure victory and allow them to wipe out the Human race once and for all.In the Strell Empire, former Supreme Overlord Xatul plans his return. He has amassed a fleet to take back control of the Kleese Empire...

Categorized as:
aliens exploration first-contact invasion military post-apocalyptic space-fleet space-opera
Earth Fleet by B.V. Larson
Rated: 4.25 of 5 stars
· 12 ratings
At long last Earth has a handful of starships. Surrounded by Rebel Kher, Imperials and the mysterious Nomads, Humanity dares to assert our right to independence. The interstellar community reacts harshly. In the eyes of our neighbors, we’re upstarts, dangerous beings that don’t know our place. For the Kher, freedom can only be won through battle...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
Even Legends Die by Jay Allan
Rated: 4.25 of 5 stars
· 12 ratings
Book eight of Jay Allan’s bestselling Crimson Worlds series (over 800,000 sold)... The final battle has begun. Gavin Stark, the former head of Alliance Intelligence, and the bitter nemesis of the Marine Corps, has made his bid for power. The manufactured clone soldiers of his Shadow Legions have seized control of dozens of colony worlds, imposing his brutal rule over millions of colonists...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
Invasion by Jay Allan
Rated: 4.25 of 5 stars
· 12 ratings
War…like none that has come before. The Hegemony has launched the invasion Tyler Barron and his Confederation comrades have feared, and all the Rim is ablaze with the fires of war and destruction. The Hegemony has brought its vast fleets, its advanced technology, and its endless legions of grim cyborg warriors to impose its system of rigid genetic hierarchy over all humanity on the Rim...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
Eyes of Tomorrow by Glynn Stewart
Rated: 4.44 of 5 stars
· 15 ratings
An ancient power unleashed from its prison.Fleets summoned by oaths old and new alike.A rising tide of war that may consume the galaxy!Captain Morgan Casimir’s mission to stop a war has ended in a nightmare. In the heart of an ignored nebula, trapped behind a ring of newborn stars, she has awoken a creature of another time: the horde of biological starships who call themselves the Infinite...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
Delphi League by Bob Blanton
Rated: 4.39 of 5 stars
· 17 ratings
The Delphineans have to deal with the fact that the Fazullan ship has slaves on it. They repatriate the Paraxean slaves with Mangkator and need to find a planet for the other slaves. But what do they do with the Fazullans? Then Catie takes is assigned the mission to take the Onisiwoens, the third set of aliens, home...

Categorized as:
aliens exploration first-contact invasion military space-fleet space-opera space-travel
Legend of the Sword by Michael R. Hicks
Rated: 4.21 of 5 stars
· 14 ratings
Six months after the alien Kreelan Empire launched its invasion of human space, the Confederation of Humanity is rapidly growing. The planet of Saint Petersburg, however, would rather see the Confederation destroyed. With a secretly built navy, they have lured the Confederation fleet into a trap, even as the Kreelans prepare another devastating attack...

Categorized as:
aliens first-contact invasion military post-apocalyptic space-opera space-travel war

Fantastic book recommendations by book lovers for book lovers.
Find out more about thebooknaut.com.

Or - use our amazing romance book finder to get recommendations based on your favorite content tropes and themes. Mix and match at will.

© Copyright 2015-2023, Elektrolabs Limited · Advertising Disclosure: Please note that many links to retailers are affiliate links, which yields a commission for us. As an Amazon Associate thebooknaut.com earns from qualifying purchases.