Book picks similar to
Obsolete Theorem by Stan C. Smith


time-travel
ebook
science-fiction
sci-fi

Now, Then, and Everywhen


Rysa Walker - 2020
    But which one broke the timeline?In 2136 Madison Grace uncovers a key to the origins of CHRONOS, a time-travel agency with ties to her family’s mysterious past. Just as she is starting to jump through history, she returns to her timeline to find millions of lives erased—and only the people inside her house realize anything has changed.In 2304 CHRONOS historian Tyson Reyes is assigned to observe the crucial events that played out in America’s civil rights movement. But a massive time shift occurs while he’s in 1965, and suddenly the history he sees isn’t the history he knows.As Madi’s and Tyson’s journeys collide, they must prevent the past from being erased forever. But strange forces are at work. Are Madi and Tyson in control or merely pawns in someone else’s game?

Waterfall


Lisa Tawn Bergren - 2011
    Stuck among the rubble of the medieval castles in rural Tuscany, on yet another hot, dusty archaeological site, Gabi and Lia are bored out of their minds...until Gabi places her hand atop a handprint in an ancient tomb and finds herself in fourteenth-century Italy. And worse yet, in the middle of a fierce battle between knights of two opposing forces.Suddenly Gabi's summer in Italy is much, much more interesting.

Sword & Flame


Jonathan Moeller - 2020
    He has crushed every enemy…but it will take more than swords to defeat his new foe. When the dreaded necromancer Lucan Mandragon returns from the grave, Mazael will need to rally all his allies and followers to face the threat. But the things hunting Lucan are far more dangerous…

Third Daughter


Susan Kaye Quinn - 2013
    But she’s the Third Daughter of the Queen of Dharia—zero responsibilities and zero royal duties. She’s just the backup daughter, in case her older sisters’ arranged marriages—to take the crown or broker an alliance—don’t quite work out. But once Aniri reaches her 18th birthday, she’ll be truly free… and then she can marry the charming fencing instructor she meets for fevered kisses in the forest. But then the impossible happens—a marriage proposal. From a barbarian prince in the north, no less. And if Aniri refuses, the threat of their new flying weapon might bring war. So she agrees to the young prince’s proposal, but only as a subterfuge to spy on him, find the weapon, and hopefully avoid both war and an arranged marriage to a man she doesn’t love. But once she arrives in the sweeping mountains of the north, she discovers the prince has his own secrets… and saving her country may end up breaking her heart. This Bollywood-style royal romance takes you to an alternate East Indian world filled with skyships, saber duels, and lots of royal intrigue. THIRD DAUGHTER is the first book in the Royals of Dharia trilogy.

Colonize


S.G. Seabourne - 2019
    No explanation, no field guide, and no rules.
 And human beings aren’t the only new arrivals. 
 Morgan’s never been a team player, and she never imagined facing disaster with a bunch of confused, terrified teenagers. To live she’ll have to make allies—human and otherwise. Because Morgan has no intention of settling down and starting anew somewhere else. Whoever brought her here can bring her back. But first, she must survive.

Retribution Falls


Chris Wooding - 2009
    An inveterate womaniser and rogue, he and his gang make a living on the wrong side of the law, avoiding the heavily armed flying frigates of the Coalition Navy. With their trio of ragged fighter craft, they run contraband, rob airships and generally make a nuisance of themselves. So a hot tip on a cargo freighter loaded with valuables seems like a great prospect for an easy heist and a fast buck. Until the heist goes wrong, and the freighter explodes. Suddenly Frey isn't just a nuisance anymore - he's public enemy number one, with the Coalition Navy on his tail and contractors hired to take him down. But Frey knows something they don't. That freighter was rigged to blow, and Frey has been framed to take the fall. If he wants to prove it, he's going to have to catch the real culprit. He must face liars and lovers, dogfights and gunfights, Dukes and daemons. It's going to take all his criminal talents to prove he's not the criminal they think he is ...

The Shadows


Hunter J. Keane - 2012
    This much she knows. It's what she doesn't know that could destroy her. Alex Garretty is just a normal teenage girl until she is yanked from her home in the middle of the night. Her entire family is moved across country and given new identities. Just when Alex thinks it can't get any worse, she meets Daniel, her mysterious but charming classmate. She quickly learns she isn't the only one keeping a big secret, and Daniel's secret could cost Alex her life. A visitor from her past arrives in town and Alex must quickly learn who she can trust. When she discovers the truth about her own destiny, Alex must find a way to accept it and even more importantly, a way to survive.

Memoirs of a Time Traveler


Doug Molitor - 2015
    Except the ball tests out to be an impossible paradox. It was signed with a ballpoint pen (not invented until 1938) using ink that's several centuries older. But then, Ariyl and Ludlo aren't who they claim to be either. Ariyl, a voluptuous 6-foot-3 beauty, turns out to be a tourist from a 22nd century paradise where time travel is the latest craze. Unbeknownst to her, however, her traveling companion, Ludlo, is a psychopath whose thefts are starting to alter history. In a world were even small changes in the timeline can cause catastrophic consequences, Ludlo's actions may completely destroy the future. To stop Ludlo, David and Ariyl must solve a mystery involving Bronze Age swordsmen, modern-day Nazis, a steampunk world, Albert Einstein, some highly skeptical Founding Fathers, and a Golden Age Hollywood where the murder of a beloved movie star will spell doom for civilization. Sci-fi meets romantic comedy...with sword-swinging adventure!

The Plantation


Stella Fitzsimons - 2012
    and a spark.A century has passed since they arrived. Human history has been erased. Children are enslaved on Alien plantations. Some have heard whispers of the existence of a rebel band of humans who roam free in the forests. Most slaves dare not speak of the rebels for fear the mutant guards will grab and make an example of them.Seventeen-year-old Freya is pulled away in the night not by the mutants, but by her old friend Finn, to join the Saviors, the mythic band of rebel teens. Her bliss fades when she discovers she is the only Savior without a special ability. She is the odd one out, slowly pushing Finn away, defying Damian, the leader of the Saviors, and antagonizing the fierce and beautiful Daphne. In her despair Freya reaches deep within to discover a dark destiny, a truth so heavy it threatens to destroy her.

The Map of Time


Félix J. Palma - 2008
    Wells as a time-traveling investigator.Characters real and imaginary come vividly to life in this whimsical triple play of intertwined plots, in which a skeptical H. G. Wells is called upon to investigate purported incidents of time travel and to save lives and literary classics, including Dracula and The Time Machine, from being wiped from existence.What happens if we change history?

The Time Bubble


Jason Ayres - 2014
    Soon things take a more serious turn as the leaps in time increase in duration. When a teenage girl goes missing, and the police become involved, suspicion falls on Charlie. How can he explain where she is? Will anyone believe him?Set in a small market town in southern England in the early 21st century, this light-hearted time travel story has plenty to delight readers of all ages.The Time Bubble is the first part of an epic series exploring the time travel genre in original and innovative ways. The novels follow the main characters from youth to middle age as they jump forwards, backwards, and sideways into alternate worlds.

The Coordinate


Marc Jacobs - 2019
    When they are assigned to work together on one last history project, they hardly expect the monotony of high school life to change. Instead, as they decode a series of unexplained clues hidden within their history project itself, Logan and Emma manage to unfold an ancient mystery that has baffled scientists and archeologists, one with powerful implications for the present day. As they embrace the adventure they’ve stumbled upon, and a growing romantic attraction to each other, Logan and Emma find themselves caught up in a dangerous, high-stakes race across the globe to decipher mankind’s past in order to save humanity’s future, not to mention their very own lives, with a mystery that just might reach towards the stars…

Never Split The Party


Ramy Vance - 2019
    Tolkien's work wasn't fiction, but a primer to help humanity get accustomed to a harsh truth? There are nine known realms, a world for each race, including dwarves, gnomes, and elves. In the middle rests Middang3ard.  Each world knows the others. Each, except Earth. Humans long ago turned their backs on magic, throwing their stock into science and technology, their governments shielding the people from the reality of what was going on elsewhere. So be it. Humans were never very good at getting along with other races anyway. Then the Dark One appeared, threatening to overrun the nine worlds, starting with Middang3ard and ending with the humans’ planet. The second planet just went dark, Earth can't stay out of the fight, but can it do anything to save its own future? Now, humans must send elite warriors to Middang3ard to fight, else humans will fight on the shores of their own lands when the Dark One invades Earth. Too bad their elite starts and ends with Robert ‘Suzuki’ Fletcher and his team of Mundanes.

The Amplified


Lauren M. Flauding - 2016
    Just like everyone else. For years, Mari has been anxiously awaiting the day when she will receive her Amplifier; a small device implanted behind the ear that gives someone limitless capabilities through verbal commands. But once she finally becomes Amplified and begins mandatory Training with the rest of her peers, she begins to see that her natural ability to resist and act for herself brings dangerous consequences, as well as unwanted scrutiny from Governor Plenaris, the Community's most revered official. She grows increasingly wary of the Amplifiers as she watches how they affect her friends and brother, constantly wondering if Amplification is really as fantastic as she thought it would be. Sure, she can perform elaborate acrobatics and recall obscure information, but how can she be sure the Amplifier isn't controlling her? Perfect for those who enjoyed Divergent and Ender's Game, The Amplified is the first in a clean three book series that explores a society where no one has to make any effort as long as they know the right thing to say.

The Thought Readers


Dima Zales - 2014
    Everyone thinks I’m a genius. Everyone is wrong. Sure, I finished Harvard at eighteen and now make crazy money at a hedge fund. But that’s not because I’m unusually smart or hard-working. It’s because I cheat. You see, I have a unique ability. I can go outside time into my own personal version of reality—the place I call “the Quiet”—where I can explore my surroundings while the rest of the world stands still. I thought I was the only one who could do this—until I met her. My name is Darren, and this is how I became entangled with all the Russians and learned that I’m a Reader.