Books like 'Portal'
Readers who enjoyed Portal by Eric Flint & Ryk E. Spoor also liked the following books featuring the same tropes, story themes, relationship dynamics and character types.
sc-fi space action / adventure space-opera first-contact time-travel aliens
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The Saints of Salvation by Peter F. Hamilton
Rated: 4.40 of 5 stars · 31 ratingsHumanity is struggling to hold out against a hostile takeover by an alien race that claims to be on a religious mission to bring all sentient life to its God at the End of Time. But while things may look grim in the immediate aftermath of the attack, mankind is busy playing an even longer game than the aliens may have expected... -
![Captain Caveman by Jerry Boyd]()
Captain Caveman by Jerry Boyd
Rated: 4.59 of 5 stars · 17 ratingsBob and the crew are off to deliver a shipload of lost property to its rightful owners. What dangers, seen and unseen, will they find at this lost colony? Will there be new crew members, waiting to be found? Find out in Bob and Nikki’s latest adventure... -
![Return by Nathan Hystad, Flynn Earl Jones]()
Return by Nathan Hystad, Flynn Earl Jones
Rated: 4.50 of 5 stars · 8 ratingsThe Rift opens once again. The battle for Earth continues. Only the Eureka and her crew can turn the tides. The Eureka returns to Sol through the Rift as an extreme time dilation creates complications. With a familiar face now the Earth Fleet's Grand Admiral, Ace and the others struggle to acclimate to their new reality... -
![The Academy by Nathan Hystad]()
The Academy by Nathan Hystad
Rated: 4.50 of 5 stars · 8 ratingsThe Academy is a galaxy-class school, created to train the next generation of Gatekeepers. Jules Parker is attending the Academy, alongside her best friend Patty. When the Kold threaten everything her father and his friends have spent years building, she must reveal that her Iskios abilities are stronger than ever...Categorized as:
aliens first-contact time-travel action-adventure book fiction galactic-empire invasion -
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![Quantum Space by Douglas Phillips]()
Quantum Space by Douglas Phillips
Rated: 4.34 of 5 stars · 30 ratingsThis is an alternate Cover Edition for ASIN: B06ZY9T5Y5.If you liked the authenticity of The Martian, the page-turning pace of Da Vinci Code, and the inspirational world view of Arthur C. Clarke, you'll love Quantum Space.High above the windswept plains of Kazakhstan, three astronauts on board a Russian Soyuz capsule begin their reentry... -
![Conspirator by C.J. Cherryh]()
Conspirator by C.J. Cherryh
Rated: 4.29 of 5 stars · 14 ratingsFirst in a brand-new "Foreigner" trilogy from Hugo Award winning author C. J. Cherryh. Cajeiri is the young son of the powerful leader of the Western Association-and he has become a target for forces bent on destroying his father's rule. For Cajeiri is the first "ateva" youth to have lived in a human environment...Categorized as:
aliens first-contact space-opera action-adventure adult audiobook book female-author -
![Shout of Honor by Sharon Lee, Steve Miller]()
Shout of Honor by Sharon Lee, Steve Miller
Rated: 4.50 of 5 stars · 6 ratingsCommander Vepal is a Hero. He is also the Yxtrang ambassador to the greater universe. These two facts do not make Vepal's life easy. But they do make it interesting... -
![Daisy's War by Scott Baron]()
Daisy's War by Scott Baron
Rated: 4.50 of 5 stars · 6 ratingsWith powerful forces working behind the scenes, Daisy seemed to be on the path to what may very well be a rousing victory. Or a glorious death, should she fail. For obvious reasons, she hoped for the former rather than the latter.She and her friends had persevered and come out on the other side time and again. Now they just had to pull together one last time to stand against their greatest foe... -
![Peacemaker by C.J. Cherryh]()
Peacemaker by C.J. Cherryh
Rated: 4.36 of 5 stars · 21 ratingsAt last—Cajeiri has his young guests from the starship, three young folk entranced by weather and trees and creatures with minds of their own. It’s all he dreamed of.. -
![Deep Space - Hidden Terror by Laurence E. Dahners]()
Deep Space - Hidden Terror by Laurence E. Dahners
Rated: 4.62 of 5 stars · 11 ratingsThis hard Sci-Fi novel is the sixth book in the “Stasis Stories,” a series of optimistic tales of technological innovation in the near future. They follow Kaem Seba, a young man with extraordinary math talents. With his friends, he’s come up with a device that allows time to be stopped within limited volumes of space-time... -
![War Eternal, Books 1-3 by M.R. Forbes]()
War Eternal, Books 1-3 by M.R. Forbes
Rated: 4.38 of 5 stars · 8 ratings3 books. 1000+ pages. Over 100,000 unbundled copies sold. Book 1: Starship Eternal A lost starship... A dire warning from futures past... A desperate search for salvation… Captain Mitchell “Ares” Williams is a Space Marine and the hero of the Battle for Liberty, whose Shot Heard ‘Round the Universe saved the planet from a nearly unstoppable war machine... -
![Formation (Forgotten Space Book 2) by M.R. Forbes]()
Formation (Forgotten Space Book 2) by M.R. Forbes
Rated: 4.30 of 5 stars · 10 ratingsAfter narrowly escaping destruction, Nicholas and his crew find themselves flung far across the universe with no way home. When a distress call from a nearby planet catches their attention, they decide to investigate with the hope the signal is somehow connected to their arrival.It isn’t long before the truth of Foresight’s mission comes into clearer focus, and Nicholas doesn’t like what he sees... -
![Your Life Is Forfeit by Craig Martelle, Michael Anderle]()
Your Life Is Forfeit by Craig Martelle, Michael Anderle
Rated: 4.59 of 5 stars · 11 ratingsRed has a price on his head. Rivka is determined to find those who put it there. Criminals commit crimes. Career criminals do it in secret. They are good at hiding.Rivka’s latest case has her hunting fugitives. Red is on a mission to find them and make them pay for what they’ve done.Her search leads her through dark warrens of political intrigue and ecological disasters...Categorized as:
aliens first-contact space-opera action-adventure audiobook book fiction galactic-empire -
![Losing Mars by Peter Cawdron]()
Losing Mars by Peter Cawdron
Rated: 4.20 of 5 stars · 15 ratingsDisaster strikes in orbit around Mars. A Chinese spacecraft is disabled, stranded near Phobos. Well over a hundred million miles from Earth, their only hope for rescue comes from the American base on the edge of the Vallis Marineris on the surface of Mars... -
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![Pretender by C.J. Cherryh]()
Pretender by C.J. Cherryh
Rated: 4.25 of 5 stars · 28 ratingsExhausted from a two-year rescue mission in space, the crew of the starship Phoenix return home to find disaster: civil war has broken out, the powerful Western Association has been overthrown, and Tabini-aiji, its forceful leader, is missing... -
![Howling Dark by Christopher Ruocchio]()
Howling Dark by Christopher Ruocchio
Rated: 4.26 of 5 stars · 24 ratingsThe second novel of the galaxy-spanning Sun Eater series merges the best of space opera and epic fantasy, as Hadrian Marlowe continues down a path that can only end in fire.Hadrian Marlowe is lost. For half a century, he has searched the farther suns for the lost planet of Vorgossos, hoping to find a way to contact the elusive alien Cielcin... -
![Space Rogues 2: Big Ship, Lots of Guns by John Wilker]()
Space Rogues 2: Big Ship, Lots of Guns by John Wilker
Rated: 4.33 of 5 stars · 6 ratingsPreviously, on Space Rogues...Thanks to an intergalactic crime boss and all around horrible being, Xarrix, there's a price on the crews' heads, no good deed goes unpunished, as they say.What do you do to keep food on the table and fuel in the tank? Take jobs as privateers of course.This page-turning adventure kicks off with Zephyr answering a call from an old friend...Categorized as:
aliens first-contact space-opera action-adventure adult book fiction galactic-empire -
![Ronin by Edward W. Robertson]()
Ronin by Edward W. Robertson
Rated: 4.33 of 5 stars · 6 ratingsThe Hive has survived their first fleet action against FinnTech. But in the process, they've lost the Hive itself. With their manufacturing base in Finn's hands, it's only a matter of time before they're outnumbered and destroyed. As Rada searches for a path to victory, she stumbles on a horrifying secret: the aliens who've kept humanity confined to the Solar System are about to make their move... -
![Stranded by the Alien Bride Lottery by Margo Bond Collins]()
Stranded by the Alien Bride Lottery by Margo Bond Collins
Rated: 4.33 of 5 stars · 6 ratingsHe's not the warrior I wanted. But now we're stranded together, and I can't quit thinking about him.I made it all the way through the Alien Bride Games without being chosen by a Khanavai male, even though I'm certain it's the only way I'll ever find anything resembling love... -
![Star Trek: The Fall: A Ceremony of Losses by David Mack]()
Star Trek: The Fall: A Ceremony of Losses by David Mack
Rated: 4.20 of 5 stars · 10 ratingsTHE NEEDS OF THE MANYDespite heroic efforts by Thirishar ch’Thane, the Andorian species is headed for extinction. Its slow march toward oblivion has reached a tipping point, one from which there will be no hope of return.THE NEEDS OF THE FEWWith countless lives at stake, the leaders of Andor, the Federation, and the Typhon Pact all scheme to twist the crisis to their political gain—at any price...Categorized as:
aliens first-contact space-opera action-adventure adult book fiction genetic-engineering -
![But The Stars by Peter Cawdron]()
But The Stars by Peter Cawdron
Rated: 4.18 of 5 stars · 11 ratings"But the stars that marked our starting fall away.We must go deeper into greater pain,for it is not permitted that we stay."–Dante Alighieri, Inferno, 1301 ADAt the start of the 22nd century, the starship Acheron is in orbit around WISE 5571 only, unbeknownst to the crew, the ship has been overrun by telepathic extraterrestrials... -
![The Eternal Tide by Kirsten Beyer]()
The Eternal Tide by Kirsten Beyer
Rated: 4.17 of 5 stars · 12 ratingsAs the Voyager fleet continues its exploration of the Delta Quadrant, investigating the current status of sectors formerly controlled by the Borg becomes a key priority. Two of the fleet's special mission vessels, the U.S.S. Galen and U.S.S...Categorized as:
aliens first-contact space-opera action-adventure adult anthologies fiction genetic-engineering -
![Raven's Children by Sabrina Chase]()
Raven's Children by Sabrina Chase
Rated: 4.17 of 5 stars · 6 ratingsMoire Cameron, former NASA explorer and web pilot, now has a working ship, a loyal crew, an unexpected son, and a valuable Earthlike planet to protect from the clutches of Toren. Then Ennis, the only one to discover her secret, is captured by Toren--and Moire discovers crucial information that could help end the crab-human war...Categorized as:
aliens first-contact space-opera time-travel action-adventure adult book colonization -
![The End of Time by Saxon Andrew]()
The End of Time by Saxon Andrew
Rated: 4.17 of 5 stars · 6 ratingsEarth and its Minor Allies have defeated the first fleet of warships sent against them but now the Majors are planning to combine their forces. If that happens, no one will survive the massive fleets moving against them.What neither side of the struggle knows is that both warring parties have been designated for destruction by an ancient enemy that has never tasted defeated...Categorized as:
aliens first-contact space-opera time-travel action-adventure book fiction galactic-empire -
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![Wonderlands by Una McCormack]()
Wonderlands by Una McCormack
Rated: 4.17 of 5 stars · 6 ratingsAn all-new novel based upon the explosive Star Trek TV series! In a desperate attempt to prevent the artificial intelligence known as Control from seizing crucial information that could destroy all sentient life, Commander Michael Burnham donned the “Red Angel” time-travel suit and guided the USS Discovery into the future and out of harm’s way... -
![Titan: Fortune of War by David Mack]()
Titan: Fortune of War by David Mack
Rated: 4.13 of 5 stars · 8 ratingsAn original spin-off novel set in the popular Star Trek: The Next Generation universe from New York Times bestselling author David Mack.Death slumbers in the ashes of silent planets, waiting to be awakened and unleashed… Twenty years have passed since the interstellar scourge known as the Husnock were exterminated without warning by a being with godlike abilities... -
![Intrepid by Nate Johnson]()
Intrepid by Nate Johnson
Rated: 4.13 of 5 stars · 8 ratingsDiscovering new worlds. What could be better. What was supposed to be a six month cruise of discovery had turned into a gloried baby sitting adventure for a bunch of civilians. Leave it to the Imperial Navy to ruin a good thing. Petty Officer Tanner just wanted to finish the patrol and get back to normal. That, and as far away from the enticing Miss Nora Johnson as possible... -
![The Masters of War by T.R. Harris]()
The Masters of War by T.R. Harris
Rated: 4.13 of 5 stars · 8 ratingsFOR THREE DAYS ONLY...get The Masters of War for only $3.99. That's a dollar off of the full retail price. From international bestselling science fiction author T.R. Harris comes Book #9 in his classic sci-fi series of Human Superiority in the universe... The Human Chronicles Saga--The Masters of War Adam Cain is an alien with an attitude..Categorized as:
aliens first-contact space-opera action-adventure adult book fiction galactic-empire -
![The Deep Beyond: Cuckoo's Egg / Serpent's Reach (Union-Alliance Universe) by C.J. Cherryh]()
The Deep Beyond: Cuckoo's Egg / Serpent's Reach (Union-Alliance Universe) by C.J. Cherryh
Rated: 4.11 of 5 stars · 9 ratingsTwo of Cherryh's stand-alone SF novels--including the Hugo Award finalist "Cuckoo's Egg"--are now available in this omnibus volume. Original.Cuckoo's EggThey named him Thorn. They told him he was of their people, although he was so different. He was ugly in their eyes, strange, sleek-skinned instead of furred, clawless, different... -
![Raise the Dawn by David R. George III]()
Raise the Dawn by David R. George III
Rated: 4.10 of 5 stars · 10 ratingsAfter the disastrous events in the Bajoran system, Captain Benjamin Sisko must confront the consequences of the recent choices he has made in his life. At the same time, the United Federation of Planets and its Khitomer Accords allies have come to the brink of war with the Typhon Pact...Categorized as:
aliens first-contact space-opera action-adventure adult book fiction genetic-engineering -
![Acts of Contrition by Kirsten Beyer, Martin Frei]()
Acts of Contrition by Kirsten Beyer, Martin Frei
Rated: 4.10 of 5 stars · 10 ratingsAn original novel set in the universe of Star Trek: Voyager; and the sequel to the New York Times bestseller Protectors!Admiral Kathryn Janeway has now taken command of the Full Circle Fleet. Her first mission: return to the Delta Quadrant and open diplomatic relations with the Confederacy of the Worlds of the First Quadrant, a civilization whose power rivals that of the Federation...Categorized as:
aliens first-contact space-opera action-adventure adult book fiction genetic-engineering -
![The Persistence of Memory by David Mack]()
The Persistence of Memory by David Mack
Rated: 4.07 of 5 stars · 14 ratingsA BRAZEN HEIST Captain Jean-Luc Picard and the Enterprise crew race to find out who has stolen Data’s android brother B-4—and for what sinister purpose... -
![Generation of Vipers by Peter Cawdron]()
Generation of Vipers by Peter Cawdron
Rated: 4.43 of 5 stars · 7 ratingsGeneration of Vipers is the sequel to Wherever Seeds May Fall.Two years have passed since comet Anduru skimmed the clouds of Saturn on its way to Earth. Kath and Nolan are looking for answers, trying to find ways to protect Earth from the possibility of an invasive alien species overrunning the planet. The US Presidential Election changes the political landscape... -
![Vacuum Diagrams by Stephen Baxter]()
Vacuum Diagrams by Stephen Baxter
Rated: 4.00 of 5 stars · 16 ratings"And everywhere the Humans went, they found life..."This dazzling future history, winner of the 2000 Philip K. Dick Award, is the most ambitious and exciting since Asimov's classic Foundation saga. It tells the story of Humankind - all the way to the end of the Universe itself...Categorized as:
aliens space-opera time-travel action-adventure adult anthologies fiction hard-sci-fi -
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![Star Trek: Der Erste Kontakt by J.M. Dillard]()
Star Trek: Der Erste Kontakt by J.M. Dillard
Rated: 4.00 of 5 stars · 15 ratingsFrom the deepest, darkest reaches of space came the greatest threat the federation had ever faced: the Borg. Half organic/half mechanical, the Borg were relentless and bent on conquering and "assimilating" all intelligent life; a single Borg vessel destroyed 39 Federation starships, decimating Starfleet...Categorized as:
aliens first-contact space-opera time-travel action-adventure adult anthologies audiobook -
![Sentenced to Prism by Alan Dean Foster]()
Sentenced to Prism by Alan Dean Foster
Rated: 4.00 of 5 stars · 14 ratingsThe company had a big problem, it was illegally exploiting a fabulously rich planet maned Prism, a world where even the tiniest creatures were living jewels. But somehow, all contact had been lost with the scientist of the survey team. The Company didn't want to draw attention to itself by sending in a rescue mission so they assigned Evan Orgell, a self-confident problem-solver, to investigate... -
![Feedback by Peter Cawdron]()
Feedback by Peter Cawdron
Rated: 4.00 of 5 stars · 13 ratingsTwenty years ago, a UFO crashed into the Yellow Sea off the Korean Peninsula. The only survivor was a young English-speaking child, captured by the North Koreans. Two decades later, a physics student watches his girlfriend disappear before his eyes, abducted from the streets of New York by what appears to be the same UFO... -
![A Time to Kill by David Mack]()
A Time to Kill by David Mack
Rated: 4.00 of 5 stars · 10 ratingsOn the cusp of their epic battle with Shinzon, many of Captain Jean-Luc Picard's long time crew were heading for new assignments and new challenges. Among the changes were William Riker's promotion to captain and his new command, Riker's marriage to Counselor Deanna Troi, and Dr. Beverly Crusher's new career at Starfleet Medical...Categorized as:
aliens first-contact space-opera action-adventure adult book fiction genetic-engineering -
![After the Fall by Peter David]()
After the Fall by Peter David
Rated: 4.00 of 5 stars · 10 ratingsThree years have passed since the events depicted in Stone and Anvil, and for the past and present crew of the USS Excalibur, life has taken many surprising twists and turns. Captain Elizabeth Shelby has been promoted to admiral and is commanding officer of Space Station Bravo – while her former starship, the USS Trident, has a new captain...Categorized as:
aliens first-contact space-opera action-adventure adult book fiction genetic-engineering -
![Forgotten History by Christopher L. Bennett]()
Forgotten History by Christopher L. Bennett
Rated: 4.00 of 5 stars · 10 ratingsThe agents of the Department of Temporal Investigations are assigned to look into an anomaly that has appeared deep in Federation territory. It's difficult to get clear readings, but a mysterious inactive vessel lies at the heart of the anomaly, one outfitted with some sort of temporal drive disrupting space-time and subspace... -
![Best Defense by David Mack]()
Best Defense by David Mack
Rated: 4.00 of 5 stars · 10 ratingsJust in time for the milestone 50th Anniversary of Star Trek: The Original Series, an epic new trilogy that stretches from the earliest voyages of the Starship Enterprise to Captain Kirk’s historic five-year-mission—and from one universe to another!A debt of honor: One brave woman ventures alone into a parallel universe to save her old shipmates, exiled there decades earlier by a mysterious... -
![The Collectors by Christopher L. Bennett]()
The Collectors by Christopher L. Bennett
Rated: 4.00 of 5 stars · 8 ratingsAn all-new Star Trek e-novella featuring the Department of Temporal Investigations!The dedicated agents of the Federation Department of Temporal Investigations have their work cut out for them protecting the course of history from the dangers of time travel. But the galaxy is littered with artifacts that, in the wrong hands, could threaten reality... -
![Blind Man's Bluff by Peter David]()
Blind Man's Bluff by Peter David
Rated: 4.00 of 5 stars · 8 ratingsCaptain MacKenzie Calhoun has faced incredible odds before, but nothing he has ever experienced could prepare him for the simultaneous threats from two of the most destructive forces he's ever encountered. The first is the D'myurj--a mysterious and powerful alien race bent on either the complete domination of humanity or its destruction . . -
![Day of the Vipers by James Swallow]()
Day of the Vipers by James Swallow
Rated: 4.00 of 5 stars · 8 ratingsBefore the Dominion War and the decimation of Cardassia...before the coming of the Emissary and the discovery of the wormhole...before space station Terok Nor became Deep Space 9™...there was the Occupation: the military takeover of an alien planet and the violent insurgency that fought against it...Categorized as:
aliens first-contact space-opera action-adventure adult book fiction genetic-engineering -
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![First Contact by D.L. Harrison]()
First Contact by D.L. Harrison
Rated: 4.00 of 5 stars · 8 ratingsAlicia Jones is a genius, and a little odd. At just twenty three years of age, she is close to finishing her doctoral dissertation. But when she tests her latest theory in the lab to generate a strong EM field, it has very unanticipated results. Results that lead to faster than light travel, and first contact with another race... -
![The Light Fantastic by Jeffrey Lang]()
The Light Fantastic by Jeffrey Lang
Rated: 4.00 of 5 stars · 8 ratingsReturning to the story begun in the novel Immortal Coil and continuing in the bestselling Cold Equations trilogy, this is the next fascinating chapter in the artificial life of one of Star Trek’s most enduring characters...Categorized as:
aliens first-contact space-opera action-adventure adult book fiction genetic-engineering -
![Child of Two Worlds by Greg Cox]()
Child of Two Worlds by Greg Cox
Rated: 4.00 of 5 stars · 6 ratingsAn all-new Star Trek novel from New York Times bestselling author Greg Cox, taking place in the blockbuster Original Series era!The year is 2255, not long after the events of the Original Series episode “The Cage.” A young Spock is science officer on the U.S.S. Enterprise, under the command of Captain Christopher Pike, when an outbreak of deadly Rigelian fever threatens the crew...Categorized as:
aliens first-contact space-opera action-adventure adult book fiction genetic-engineering -
![Terok Nor: Dawn of the Eagles by S.D. Perry]()
Terok Nor: Dawn of the Eagles by S.D. Perry
Rated: 4.00 of 5 stars · 6 ratingsBefore the Dominion War and the decimation of Cardassia...before the coming of the Emissary and the discovery of the wormhole...before space station Terok Nor became Deep Space 9™...there was the Occupation: the military takeover of an alien planet and the violent insurgency that fought against it...Categorized as:
aliens first-contact space-opera action-adventure adult book fiction genetic-engineering -
![Echoes and Refractions by Geoff Trowbridge, Keith R.A. DeCandido]()
Echoes and Refractions by Geoff Trowbridge, Keith R.A. DeCandido
Rated: 4.00 of 5 stars · 6 ratingsIt's been said that for any event, there are an infinite number of possible outcomes. Our choices determine which outcome will follow, and therefore all possibilities that could happen do happen across countless alternate realities. In these divergent realms, known history is bent, like white light through a prism -- broken into a boundless spectrum of what-might-have-beens...Categorized as:
aliens first-contact space-opera action-adventure adult anthologies fiction genetic-engineering -
![Man-Kzin Wars X: The Wunder War by Hal G.P. Colebatch, Larry Niven]()
Man-Kzin Wars X: The Wunder War by Hal G.P. Colebatch, Larry Niven
Rated: 4.00 of 5 stars · 6 ratingsThe first colonists from Earth named the planet Wunderland. Generations later, the felinoid alien invaders called Kzin came and turned it into a hell for humans...
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