Book picks similar to
On The Rocks by Peter Rhodan


time-travel
sci-fi
alternate-history
alt-history

Cast Under an Alien Sun


Olan Thorensen - 2016
    A cross-genre adventure with elements of science fiction, history, hard science, epic fantasy, time travel, romance, alien contact, and space colonization.Joe Colsco boarded a flight from San Francisco to Chicago to attend a national chemistry meeting. He would never set foot on Earth again.On planet Anyar, Joe is found unconscious on a beach of a large island inhabited by humans where the level of technology is similar to Earth circa 1700. He awakes amidst strangers speaking an unintelligible language, and struggles to accept losing his previous life and finding a place in a society with different customs, needing a way to support himself, and not knowing a single soul. His worry about finding a place is assuaged when he finds ways to apply his knowledge of chemistry—as long as he is circumspect in introducing new knowledge not too far in advance of the planet’s technology and being labelled a demon.As he adjusts, Joe finds that he has be dropped into a developing clash between the people who cared for him, and for whom he develops an affinity, and a military power from elsewhere on the planet, a power with designs on conquest.Unaware, Joseph Colsco has been poured into a crucible, where time and trials will transform him in ways he could never have imagined.

The Cross-Time Engineer


Leo Frankowski - 1986
    But several days of ever stranger events convinced him that he had somehow been stranded in 1231 A.D.And that meant Conrad had to turn Medieval Poland into the most powerful contry in the world. Otherwise the Mongols were destined to detroy it--in just ten years!

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.

The Emperor's Men 1: Arrival


Dirk van den Boom - 2010
    But near Portugal the old ship encounters a mysterious phenomenon, and the crew unexpectedly finds itself in the Mediterranean, 1500 years in the past, at a historical moment: It’s the year 378, the beginning of the end of the Western Roman Empire, the start of Völkerwanderung…the crew of the Saarbrücken decides that to survive they must make friends of the Romans. They had been the Kaiser’s men in the 20th century, and now, in the past, another emperor might need their services…

Clash of Eagles


Alan Smale - 2015
    But Marcellinus and his troops have woefully underestimated the fighting prowess of the Native American inhabitants. When Gaius is caught behind enemy lines and spared, he must reevaluate his allegiances and find a new place in this strange land.

Through the Gate


L.J. Dalton Jr. - 2019
    He unknowingly walked through a star gate or portal to another world. The planet Cornu was settled by humans in the distance past who came through gates from earth. There were changes to human genes that strongly influenced human society. More women than man dictated multiple wives. Low fertility and birthrate with low population growth limited large scale conflicts. Pheromones played an important part in picking mates and in libido. The technology was early eighteenth century and progress was slow. Much of the progress came from the very rare person who came through the gates. While wars weren’t waged due to population loss. Bloody dynastic plots were hatched and waged. One particularly nasty and deadly one was conceived against the royal family of Nordia by a rival kingdom. When he arrived, Mike was disoriented and worried about his sanity. Was this real or a delusion? He gathered himself and slowly set out to explore this new world and soon found himself hip deep in the plot.

The Sword of Jupiter (Imperium Book 1)


Travis Starnes - 2021
    

Island in the Sea of Time


S.M. Stirling - 1998
    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...but have been transported instead to the Bronze Age! Now they must learn to survive with suspicious, warlike peoples they can barely understand and deal with impending disaster, in the shape of a would-be conqueror from their own time.

Forget the Alamo!


Drew McGunn - 2017
    Alive is good. Except he finds himself at the Alamo in 1836 in the body of another man doomed to die. If history repeats itself, Santa Anna is coming soon and the Alamo will fall, along with himself and 189 others. In a race against time itself, Will uses his knowledge of the future to change the past. He will use every means necessary, even if it means abandoning the fort. He is determined to forget the Alamo!

Rally Cry


William R. Forstchen - 1990
    But they also found themselves up against creatures who considered humans mere cattle to sacrifice!

Bitter Seeds


Ian Tregillis - 2010
    The Nazis have supermen, the British have demons, and one perfectly normal man gets caught in betweenRaybould Marsh is a British secret agent in the early days of the Second World War, haunted by something strange he saw on a mission during the Spanish Civil War: a German woman with wires going into her head who looked at him as if she knew him.When the Nazis start running missions with people who have unnatural abilities--a woman who can turn invisible, a man who can walk through walls, and the woman Marsh saw in Spain who can use her knowledge of the future to twist the present--Marsh is the man who has to face them. He rallies the secret warlocks of Britain to hold the impending invasion at bay. But magic always exacts a price. Eventually, the sacrifice necessary to defeat the enemy will be as terrible as outright loss would be.Alan Furst meets Alan Moore in the opening of an epic of supernatural alternate history, the tale of a twentieth century like ours and also profoundly different.

The Guns of the South


Harry Turtledove - 1992
    Lee faces defeat. The Army of Northern Virginia is ragged and ill-equpped. Gettysburg has broken the back of the Confederacy and decimated its manpower.Then, Andries Rhoodie, a strange man with an unplaceable accent, approaches Lee with an extraordinary offer. Rhoodie demonstrates an amazing rifle: Its rate of fire is incredible, its lethal efficiency breathtaking--and Rhoodie guarantees unlimited quantitites to the Confederates.The name of the weapon is the AK-47...."It is absolutely unique--without question the most fascinating Civil War novel I have ever read." –Professor James M. McPherson – Pultizer Prize winning Battle Cry of Freedom

A History of What Comes Next


Sylvain Neuvel - 2021
    Preserve the knowledge.Survive at all costs.Take them to the stars.Over 99 identical generations, Mia’s family has shaped human history to push them to the stars, making brutal, wrenching choices and sacrificing countless lives. Her turn comes at the dawn of the age of rocketry. Her mission: to lure Wernher Von Braun away from the Nazi party and into the American rocket program, and secure the future of the space race. But Mia’s family is not the only group pushing the levers of history: an even more ruthless enemy lurks behind the scenes.A darkly satirical first contact thriller, as seen through the eyes of the women who make progress possible and the men who are determined to stop them...

Weapons of Choice


John Birmingham - 2004
    . . . The impossible has spawned the unthinkable. A military experiment in the year 2021 has thrust an American-led multinational armada back to 1942, right into the middle of the U.S. naval task force speeding toward Midway Atoll—and what was to be the most spectacular U.S. triumph of the entire war. Thousands died in the chaos, but the ripples had only begun. For these veterans of Pearl Harbor—led by Admirals Nimitz, Halsey, and Spruance—have never seen a helicopter, or a satellite link, or a nuclear weapon. And they’ve never encountered an African American colonel or a British naval commander who was a woman and half-Pakistani. While they embrace the armada’s awesome firepower, they may find the twenty-first century sailors themselves far from acceptable.Initial jubilation at news the Allies would win the war is quickly doused by the chilling realization that the time travelers themselves—by their very presence—have rendered history null and void. Celebration turns to dread when the possibility arises that other elements of the twenty-first century task force may have also made the trip—and might now be aiding Yamamoto and the Japanese.What happens next is anybody’s guess—and everybody’s nightmare. . . .From the Trade Paperback edition.

Leviathan


Scott Westerfeld - 2009
    His own people have turned on him. His title is worthless. All he has is a battletorn war machine and a loyal crew of men.Deryn Sharp is a commoner, disguised as a boy in the British Air Service. She's a brilliant airman. But her secret is in constant danger of being discovered.With World War I brewing, Alek and Deryn's paths cross in the most unexpected way…taking them on a fantastical, around-the-world adventure that will change both their lives forever.