Books like '7th Sigma'
Readers who enjoyed 7th Sigma by Steven Gould also liked the following books featuring the same tropes, story themes, relationship dynamics and character types.
historical sc-fi action / adventure alternate history dystopia apocalyptic western post-apocalyptic industrial-era
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The Sapphire Brooch by Katherine Lowry Logan
Rated: 4.44 of 5 stars · 16 ratingsThe long awaited sequel to the Kindle Time Travel Romance Bestseller THE RUBY BROOCH! The saga of the brooches continues in this Civil War Time Travel Romance... A Union soldier risks everything to save the life of Abraham Lincoln, while a Confederate surgeon races through time to preserve Lincoln’s Legacy. Reenactor Dr...Categorized as:
industrial-era western 19th-century action-adventure adult alternate-history audiobook book -
![Lost In Time : An Old Fashion Western by S.A. Ison]()
Lost In Time : An Old Fashion Western by S.A. Ison
Rated: 4.50 of 5 stars · 10 ratingsSawyer Reed is heading home after rambling for seven years after the Civil War ended. His family's cattle ranch is waiting, and he is ready to get to work. On his way home from Mexico, Sawyer runs into a mysterious woman who will change his life and his future forever. Josephine Alverez is a chef at a posh restaurant in San Antonio, Texas in the year 2020...Categorized as:
industrial-era western action-adventure adult alternate-history audiobook book fiction -
![The Relentless Moon by Mary Robinette Kowal]()
The Relentless Moon by Mary Robinette Kowal
Rated: 4.39 of 5 stars · 30 ratingsMary Robinette Kowal continues her award-winning Lady Astronaut series, which began with The Calculating Stars and The Fated Sky, with The Relentless Moon.The Earth is coming to the boiling point as the climate disaster of the Meteor strike becomes more and more clear, but the political situation is already overheated. Riots and sabotage plague the space program...Categorized as:
apocalyptic dystopia post-apocalyptic action-adventure adult alternate-history audiobook book -
![Executed by R.R. Haywood]()
Executed by R.R. Haywood
Rated: 4.36 of 5 stars · 30 ratingsThe team of heroes extracted from their timelines to stop the impending apocalypse didn’t think they needed a leader.But they’ve got one anyway.With their mission in tatters, Miri has been called in to steady the ship. And to focus them on their assignment: preventing the end of the world.The problem is, the world doesn’t know it’s in danger...Categorized as:
apocalyptic dystopia post-apocalyptic action-adventure adult alternate-history audiobook book -
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![The Fated Sky by Mary Robinette Kowal]()
The Fated Sky by Mary Robinette Kowal
Rated: 4.30 of 5 stars · 35 ratingsThe Fated Sky continued the grand sweep of alternate history begun in The Calculating Stars. It is 1961, and the International Aerospace Coalition has established a colony on the moon. Elma York, the noted Lady Astronaut, is working on rotation, flying shuttles on the moon and returning regularly to Earth.But humanity must get a foothold on Mars... -
![Anathem by Neal Stephenson]()
Anathem by Neal Stephenson
Rated: 4.16 of 5 stars · 35 ratingsFraa Erasmas is a young avout living in the Concent of Saunt Edhar, a sanctuary for mathematicians, scientists, and philosophers, protected from the corrupting influences of the outside "saecular" world by ancient stone, honored traditions, and complex rituals. Over the centuries, cities and governments have risen and fallen beyond the concent's walls... -
![The Children of First Man by James Alexander Thom]()
The Children of First Man by James Alexander Thom
Rated: 4.20 of 5 stars · 10 ratingsWith its beautifully written and deeply felt descriptions of the feelings the first white settlers and Native Americans had for each other, THE CHILDREN OF FIRST MAN tells the fascinating story of a European people gradually absorbed into the Amerindian culture until their literacy was lost and their Christian religion submerged in the legend of a Welsh Prince named Madoc, the First Man... -
![Fateful Lightning by William R. Forstchen]()
Fateful Lightning by William R. Forstchen
Rated: 4.20 of 5 stars · 10 ratingsThe latest chapter in a unique, epic military science fiction series that sweeps from Civil War America to a time-warped world of horrifying conflict. The Civil War Yankees, lost in another world and time, find themselves part of a tactical retreat from the onslaught of the mysterious Merki hordes, reenacting the Russian retreats against the French and Germans...Categorized as:
dystopia post-apocalyptic action-adventure adult alternate-history audiobook book drama -
![Here There Be Monsters by Meljean Brook]()
Here There Be Monsters by Meljean Brook
Rated: 4.14 of 5 stars · 14 ratingsTwo years ago, blacksmith Ivy, desperate to flee London, purchased her overseas passage by agreeing to spend the voyage in the bed of the pirate captain, Mad Machen... -
![By Schism Rent Asunder by David Weber]()
By Schism Rent Asunder by David Weber
Rated: 4.11 of 5 stars · 18 ratingsThe world has changed. The mercantile kingdom of Charis has prevailed over the alliance designed to exterminate it. Armed with better sailing vessels, better guns and better devices of all sorts, Charis faced the combined navies of the rest of the world at Darcos Sound and Armageddon Reef, and broke them...Categorized as:
apocalyptic dystopia post-apocalyptic action-adventure adult ai alternate-history audiobook -
![The Very First Damned Thing by Jodi Taylor]()
The Very First Damned Thing by Jodi Taylor
Rated: 4.11 of 5 stars · 18 ratingsEver wondered how it all began?It’s two years since the final victory at the Battersea Barricades. The fighting might be finished, but for Dr Bairstow, just now setting up St Mary's, the struggle is only beginning...Categorized as:
dystopia industrial-era action-adventure adult alternate-history audiobook book comedy -
![Firestorm by Taylor Anderson]()
Firestorm by Taylor Anderson
Rated: 4.19 of 5 stars · 26 ratingsLieutenant Commander Matthew Reddy and the crew of the USS Walker find themselves caught between the nation they swore to defend and the allies they promised to protect... -
![Liberty by Lindsay Buroker]()
Liberty by Lindsay Buroker
Rated: 4.28 of 5 stars · 13 ratingsKali has been working toward her dream of building an airship and escaping the frozen Yukon for so long that she can scarcely believe it’s close to becoming a reality. There’s just one problem. Cedar, her friend and business partner (and maybe a little more), is in jail, and the American authorities are on their way to hang him...Categorized as:
industrial-era western action-adventure alpha-mc alternate-history book female-mc fiction -
![Invasion: Zombie Apocalypse by M.D. Massey]()
Invasion: Zombie Apocalypse by M.D. Massey
Rated: 4.13 of 5 stars · 8 ratingsTHEM Invasion: Book Zero in the Scratch Sullivan Paranormal Post-Apocalyptic Action Novel Series...Aidan "Scratch" Sullivan is a former Army Ranger and Afghanistan War vet trying to achieve some semblance of normalcy while he deals with the psychological after-effects of two combat tours in the 'Stan... -
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![The Change by S.M. Stirling]()
The Change by S.M. Stirling
Rated: 4.10 of 5 stars · 10 ratingsALL-NEW STORIES OF THE EMBERVERSEby S.M. Stirling, Harry Turtledove, Walter Jon Williams, John Birmingham, John Barnes, Jane Lindskold, and more...S. M... -
![High Cotton by Joe R. Lansdale]()
High Cotton by Joe R. Lansdale
Rated: 4.10 of 5 stars · 10 ratingsThis collection of Joe R. Lansdale stories represents the best of the “Lansdale” genre—a strange mixture of dark crime, even darker humor, and adventure tales. The stories are varied in setting and theme, but they are all pure Lansdale—eerie, amusing, and occasionally horrific. In “The Pit,” modern gladiators square off against one another using Roman methods...Categorized as:
apocalyptic industrial-era western action-adventure adult alternate-history anthologies crime -
![Forbidden Planet by Cheree Alsop]()
Forbidden Planet by Cheree Alsop
Rated: 4.10 of 5 stars · 10 ratingsWhen Captain Nova Ardis acquires the services of a dangerous, tattooed gladiator, she knows she’s taking a risk—but she would do anything for family.Kove has survived most of his life in the gladiator arena and now, on the eve of winning his freedom, he is sold once again. At least being the captain’s bodyguard shouldn’t be too hard compared to the bloody life he’s lived...Categorized as:
industrial-era western action-adventure adult alternate-history book fiction futuristic -
![Peacemaker by Lindsay Buroker]()
Peacemaker by Lindsay Buroker
Rated: 4.08 of 5 stars · 12 ratingsHalf-breed tinkerer Kali McAlister doesn’t care that the gold rush has stormed into Dawson and prospectors are flooding the north—all she wants is to finish construction of her airship, so she can escape the Yukon and see the world...Categorized as:
industrial-era western action-adventure alternate-history book comedy fiction historical -
![Hunted by Lindsay Buroker]()
Hunted by Lindsay Buroker
Rated: 4.07 of 5 stars · 14 ratingsSelf-taught tinkerer Kali McAlister is determined to build an airship and escape the frigid Yukon forever. Unfortunately, she’s the heir to the secrets of flash gold, an alchemical energy source that tends to make her a popular target for bandits, gangsters, and pirates...Categorized as:
industrial-era western action-adventure alternate-history book comedy fiction historical -
![The Ruby Brooch by Katherine Lowry Logan]()
The Ruby Brooch by Katherine Lowry Logan
Rated: 4.06 of 5 stars · 18 ratingsCan a 21st century paramedic find her true identity on the other side of the heather-scented mist?From the white-plank fenced pastures of Lexington, Kentucky, to the beautiful Bay of San Francisco, The Ruby Brooch, a saga rich in detail and mystery, follows a young woman’s physical and emotional journey as she searches for the truth she believes will heal her wounds, restore her sense of self,...Categorized as:
industrial-era western action-adventure adult alternate-history animals audiobook book -
![All the Dead Shall Weep by Charlaine Harris]()
All the Dead Shall Weep by Charlaine Harris
Rated: 4.06 of 5 stars · 18 ratings#1 New York Times and USA TODAY bestselling author returns with the fifth installment in the bestselling Gunnie Rose series as sisters Lizbeth Rose and Felicia as well as brother Eli and Peter, are reunited in Texoma only to break apart before the Wizard’s Ball held in San Diego, which will determine all their fates... -
![The Gate to Women's Country by Sheri S. Tepper]()
The Gate to Women's Country by Sheri S. Tepper
Rated: 4.04 of 5 stars · 24 ratingsTepper's finest novel to date is set in a post-holocaust feminist dystopia that offers only two political alternatives: a repressive polygamist sect that is slowly self-destructing through inbreeding and the matriarchal dictatorship called Women's Country... -
![Doomsday Book by Connie Willis]()
Doomsday Book by Connie Willis
Rated: 4.03 of 5 stars · 32 ratingsFor Kivrin, preparing an on-site study of one of the deadliest eras in humanity's history was as simple as receiving inoculations against the diseases of the fourteenth century and inventing an alibi for a woman traveling alone. For her instructors in the twenty-first century, it meant painstaking calculations and careful monitoring of the rendezvous location where Kivrin would be received... -
![Claimed by Lindsay Buroker]()
Claimed by Lindsay Buroker
Rated: 4.21 of 5 stars · 16 ratingsAfter years on the hunt, Cedar Kartes is finally within striking distance of Cudgel Conrad, the criminal who slew his brother and framed him for murder. With the help of Kali McAlister, his business partner and the woman he’s mustering the courage to court, he believes he can finally rid the world of a bloodthirsty felon. But nothing is ever easy in the Yukon...Categorized as:
industrial-era western action-adventure adult alternate-history book fiction historical -
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![Alas, Babylon by Pat Frank]()
Alas, Babylon by Pat Frank
Rated: 4.03 of 5 stars · 46 ratings“An extraordinary real picture of human beings numbed by catastrophe but still driven by the unconquerable determination of living creatures to keep on being alive.” —The New Yorker“Alas, Babylon.” Those fateful words heralded the end... -
![Island in the Sea of Time by S.M. Stirling]()
Island in the Sea of Time by S.M. Stirling
Rated: 4.00 of 5 stars · 18 ratings"Utterly engaging...a page-turner that is certain to win the author legions of new readers and fans."--George R. R. Martin, author of A Game of ThronesIt's spring on Nantucket and everything is perfectly normal, until a sudden storm blankets the entire island. When the weather clears, the island's inhabitants find that they are no longer in the late twentieth century.. -
![Against the Tide of Years by S.M. Stirling]()
Against the Tide of Years by S.M. Stirling
Rated: 4.00 of 5 stars · 18 ratingsIn the years since the Event, the Republic of Nantucket has done its best to recreate the better ideas of the modern age. But the evils of its time resurface in the person of William Walker, renegade Coast Guard officer, who is busy building an empire for himself based on conquest by technology... -
![On the Oceans of Eternity by S.M. Stirling]()
On the Oceans of Eternity by S.M. Stirling
Rated: 4.00 of 5 stars · 18 ratingsHarry Turtledove hailed Island in the Sea of Time as "one of the best time travel/alternative history stories I've ever read," and Jane Lindskold called Against the Tide of Years "another exciting and explosive tale." Now the adventures of the Nantucket islanders lost in the time of the Bronze Age continues with On the Oceans of Eternity...Categorized as:
apocalyptic post-apocalyptic action-adventure adult alternate-history audiobook book epic -
![Skykeep by Joseph R. Lallo]()
Skykeep by Joseph R. Lallo
Rated: 4.23 of 5 stars · 10 ratingsIt has taken some adjustment, but Nita Graus has made quite a home for herself among the crew of the Wind Breaker. Under her skillful care it has become one of the only airships to stay aloft without the continuous repair and oversight of the vile and manipulative fug folk... -
![Brilliant Devices by Shelley Adina]()
Brilliant Devices by Shelley Adina
Rated: 4.00 of 5 stars · 14 ratingsBook four in the Magnificent Devices steampunk series! A lady of resources has the power to change the world-if she can stay alive long enough to do it. Lady Claire Trevelyan had been looking forward to glittering balls, congenial society, and relief from pursuit during her stay with Lord and Lady Dunsmuir in the Canadas. Well, perhaps not entirely...Categorized as:
industrial-era western action-adventure alternate-history audiobook book coming-of-age epic -
![Devils Unto Dust by Emma Berquist]()
Devils Unto Dust by Emma Berquist
Rated: 4.00 of 5 stars · 12 ratingsLife out here is hard. So you have to be harder.Willie has always survived. No matter what life in Glory, Texas, has thrown at her. The sickness that swept through the state and turned most living creatures into terrifying shakes. Her own mother succumbing to the disease. Her father disappearing into saloons and gambling and liquor. Willie survives... -
![Tin Swift by Devon Monk]()
Tin Swift by Devon Monk
Rated: 4.00 of 5 stars · 12 ratingsIn steam age America, men, monsters, machines and magic battle to claim the same scrap of earth and sky. In this chaos, one man fights to hold on to his humanity--and his honor. . . Life on the frontier is full of deceit and danger, but bounty hunter Cedar Hunt is a man whose word is his bond. Cursed with becoming a beast every full moon, Cedar once believed his destiny was to be alone...Categorized as:
industrial-era western action-adventure adult alternate-history book female-author fiction -
![Cold Copper by Devon Monk]()
Cold Copper by Devon Monk
Rated: 4.00 of 5 stars · 10 ratingsIn steam age America, men, monsters, machines, and magic battle to claim the same scrap of earth and sky. In this madness, one man struggles to keep his humanity, his honor, and his hell-bent mission intact... Bounty hunter and lycanthrope Cedar Hunt vowed to track down all seven pieces of the Holder—a strange device capable of deadly destruction...Categorized as:
dystopia industrial-era western action-adventure adult alternate-history book fiction -
![Coilhunter by Dean F. Wilson]()
Coilhunter by Dean F. Wilson
Rated: 4.12 of 5 stars · 15 ratingsWelcome to the Wild North, a desolate wasteland where criminals go to hide—if they can outlast the drought and the dangers of the desert. Or the dangers of something else. Meet Nox, the Coilhunter. A mechanic and toymaker by trade, a bounty hunter by circumstance. He isn't in it for the money. He's in it for justice, and there's a lot of justice that needs to be paid...Categorized as:
dystopia industrial-era western action-adventure adult alternate-history audiobook book -
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![Rustkiller by Dean F. Wilson]()
Rustkiller by Dean F. Wilson
Rated: 4.25 of 5 stars · 8 ratingsWelcome to the Rust Valley. The Wild North is full of nasty places, but there are some places you just don’t go. One of them is that scrapyard desert known as the Rust Valley. It’s where vehicles go to die. That’s why you don’t go in after them. The bounty hunter Nox made a promise to himself that he’d never be caught dead there... -
![West by Lizzy Ford]()
West by Lizzy Ford
Rated: 4.00 of 5 stars · 8 ratingsIf you could change history, would you?College graduate Josephine “Josie” Jackson answers ‘yes’ to the question on a survey while visiting an Old West tourist trap. The next morning, she wakes up in Indian Territory in the 1840s, where she’s given a mission to complete before she can return to her time: to reset history by finding and stopping the man responsible for a horrific massacre...Categorized as:
dystopia industrial-era western action-adventure adult alternate-history audiobook book -
![Apocalypse Coming- (Revised Edition) A Novel of Tribulation and Survival (The Tears of Ephraim: Book One) by William Dunaway]()
Apocalypse Coming- (Revised Edition) A Novel of Tribulation and Survival (The Tears of Ephraim: Book One) by William Dunaway
Rated: 4.00 of 5 stars · 6 ratings"For the time will come when people will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear."After a political protest is hijacked by anarchists, mob mentality takes over and violent riots start breaking out in many of our major cities...Categorized as:
apocalyptic dystopia post-apocalyptic action-adventure adult alternate-history book christian -
![Countdown: The Liberators by Tom Kratman]()
Countdown: The Liberators by Tom Kratman
Rated: 4.00 of 5 stars · 6 ratingsBack in ActionOld Soldiers never die...except inside, when they lack a reason to live. Old soldier Wes Stauer is dying inside, from sheer lack of purpose.And then comes the knock on the door: "Our leader's son and heir has been kidnapped. We don't know where he is. We need you to get him back for us. The people who have him are numerous, warlike, and well armed. But money is no object...Categorized as:
industrial-era western action-adventure adult alternate-history book fiction historical -
![Patternmaster by Octavia E. Butler]()
Patternmaster by Octavia E. Butler
Rated: 4.02 of 5 stars · 30 ratingsThe combined mind-force of a telepathic race, Patternist thoughts can destroy, heal, rule. For the strongest mind commands the entire pattern and all within. Now the son of the Patternmaster craves this ultimate power, He has murdered or enslaved every threat to his ambition--except one... -
![BioShock: Rapture by John Shirley]()
BioShock: Rapture by John Shirley
Rated: 3.95 of 5 stars · 21 ratingsIt's the end of World War II. FDR's New Deal has redefined American politics. Taxes are at an all-time high. The bombing of Hiroshima and Nagasaki has brought a fear of total annihilation. The rise of secret government agencies and sanctions on business has many watching their backs. America's sense of freedom is diminishing . . . and many are desperate to take that freedom back... -
![Magnificent Devices by Shelley Adina]()
Magnificent Devices by Shelley Adina
Rated: 3.94 of 5 stars · 16 ratingsAn air voyage to remember turns into a disaster no one may survive.With her orphaned charges, Lady Claire Trevelyan joins the Earl of Dunsmuir’s family on an airship voyage to the Americas. If she can stay out of Lord James Selwyn’s way until her eighteenth birthday, she will be of age and cannot be forced into marriage...Categorized as:
industrial-era western action-adventure alternate-history audiobook book coming-of-age epic -
![A Web of Air by Philip Reeve]()
A Web of Air by Philip Reeve
Rated: 3.94 of 5 stars · 16 ratingsTwo years ago, Fever Crumb escaped the war-torn city of London in a travelling theatre. Now she arrives in the extraordinary crater city of Mayda, where buildings ascend the cliffs on funicular rails, and a mysterious recluse is building a machine that can fly. Fever is the engineer he needs - but ruthless enemies will kill to possess their secrets... -
![The Rift Walker by Clay Griffith, Susan Griffith]()
The Rift Walker by Clay Griffith, Susan Griffith
Rated: 3.93 of 5 stars · 15 ratingsPrincess Adele struggles with a life of marriage and obligation as her Equatorian Empire and their American Republic allies stand on the brink of war against the vampire clans of the north. However, the alliance's horrific strategy for total victory drives Adele to abandon her duty and embark on a desperate quest to keep her nation from staining its hands with genocide... -
![Gunpowder & Embers by John Ringo, Kacey Ezell]()
Gunpowder & Embers by John Ringo, Kacey Ezell
Rated: 4.13 of 5 stars · 8 ratingsIn the smoking ruins of our world, will the struggle for yesterday's technology spark tomorrow's global war? A new postapocalyptic novel, in which a young cowboy claims his destiny—and tries to prevent a catastophic war—from New York Times best-selling author John Ringo, Kacey Ezell, and Christopher L. Smith. WAR IN THE SMOKING RUINS OF TOMORROW! Thirty years ago, the world ended...Categorized as:
apocalyptic dystopia industrial-era post-apocalyptic western action-adventure adult aliens -
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![The Grapple by Harry Turtledove]()
The Grapple by Harry Turtledove
Rated: 3.93 of 5 stars · 14 ratingsIn this stunning retelling of World War II, Harry Turtledove has created a blockbuster saga that is thrilling, troubling, and utterly compelling...Categorized as:
industrial-era post-apocalyptic 20th-century action-adventure adult alternate-history book fiction -
![The Calculating Stars by Mary Robinette Kowal]()
The Calculating Stars by Mary Robinette Kowal
Rated: 3.98 of 5 stars · 38 ratingsOn a cold spring night in 1952, a huge meteorite fell to earth and obliterated much of the east coast of the United States, including Washington D.C. The ensuing climate cataclysm will soon render the earth inhospitable for humanity, as the last such meteorite did for the dinosaurs... -
![The Expeditioners and the Treasure of Drowned Man's Canyon by S.S. Taylor, Katherine Roy]()
The Expeditioners and the Treasure of Drowned Man's Canyon by S.S. Taylor, Katherine Roy
Rated: 3.92 of 5 stars · 12 ratingsComputers have failed, electricity is extinct, and the race to discover new lands is underway! Brilliant explorer Alexander West has just died under mysterious circumstances, but not before smuggling half of a strange map to his intrepid children—Kit the brain, M.K. the tinkerer, and Zander the brave... -
![On the Beach by Nevil Shute]()
On the Beach by Nevil Shute
Rated: 3.93 of 5 stars · 28 ratingsAfter the war is over, a radioactive cloud begins to sweep southwards on the winds, gradually poisoning everything in its path. An American submarine captain is among the survivors left sheltering in Australia, preparing with the locals for the inevitable. Despite his memories of his wife, he becomes close to a young woman struggling to accept the harsh realities of their situation... -
![Extracted by R.R. Haywood]()
Extracted by R.R. Haywood
Rated: 3.92 of 5 stars · 24 ratingsIn 2061, a young scientist invents a time machine to fix a tragedy in his past. But his good intentions turn catastrophic when an early test reveals something unexpected: the end of the world.A desperate plan is formed. Recruit three heroes, ordinary humans capable of extraordinary things, and change the future...Categorized as:
apocalyptic dystopia post-apocalyptic action-adventure alternate-history audiobook book fiction -
![Liberator by Richard Harland]()
Liberator by Richard Harland
Rated: 3.88 of 5 stars · 8 ratingsEquality remains elusive in this stunning steampunk sequel to Worldshaker. In the aftermath of the events of Worldshaker, the Filthies control the massive juggernaut, now called Liberator. Many members of the former upper class, called Swanks, have remained behind to help teach them how to operate the juggernaut and to build a new society together. But all is not idyllic aboard Liberator...Categorized as:
dystopia industrial-era post-apocalyptic action-adventure alternate-history audiobook book drama
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