In one of the most unsettling "what-if" reversals to American history, the Union Army is overrun at the Battle of Antietam. Left with no alternative, President Lincoln surrenders, and the Confederate States of America becomes an independent nation. It's a tragic twist that will produce dire, far-reaching ramifications. As the divided American nations move into the 20th century, slavery has long since been abolished; but in the summer of 1941, America faces another challenge - an existential challenge.

A military unit is thrust back into Paleolithic times with only their guns and portable hardware. Ten soldiers on convoy in Afghanistan suddenly find themselves lost in time. Somehow they arrived in Earth's Paleolithic Asia. With no idea how they arrived or how to get back, the shock of the event is severe. They discover groups of the similarly displaced: imperial Romans, Neolithic Europeans, and a small cadre of East Indian peasants.

Few figures in American politics have seen more and said less than Mitt Romney. An outspoken dissident in Donald Trump’s GOP, he has made headlines in recent years for standing alone against the forces he believes are poisoning the party he once led. Romney was the first senator in history to vote to remove from office a president of his own party. When that president’s supporters went on to storm the US Capitol, Romney delivered a thundering speech from the Senate floor accusing his fellow Republicans of stoking insurrection.

After centuries of suffering under the English crown, a wealthy American entrepreneur in the 21st century finds an alien craft that can travel through time. That man is my best friend. And he figured out how to use that alien tech with one goal in mind: to go back in time and use our modern technology and knowledge to help the American colonists defeat the English and change the course of history for the better. And why does he ask me to be the one to make this precarious journey? Because after a British official murdered my wife and got away with it, I have nothing left to lose.

In these 34 intriguing episodes, leading historian Christopher Andrew rewrites history, considering what might have transpired if pivotal events had turned out differently. By altering a single, plausible fact, he explores alternative futures where the Spanish Armada landed on English soil, Pontius Pilate freed Jesus, the Nazis occupied Britain and many more.

In Unruly, David Mitchell explores how early England’s monarchs, while acting as feared rulers firmly guiding their subjects’ destinies, were in reality a bunch of lucky bastards who were mostly as silly and weird in real life as they appear today in their portraits.

It is the 14th century, and one of the most apocalyptic events in human history is set to occur - the coming of the Black Death. History teaches us that a third of Europe's population was destroyed. But what if the plague had killed 99 percent of the population instead? How would the world have changed? This is a look at the history that could have been - a history that stretches across centuries, a history that sees dynasties and nations rise and crumble, a history that spans horrible famine and magnificent innovation.

In April 1945, the Allies are charging toward Berlin from the west, the Russians from the east. For Hitler, the situation is hopeless. But at this turning point in history, another war is about to explode. To win World War II, the Allies dealt with the devil. Joseph Stalin helped FDR, Churchill, and Truman crush Hitler. But what if "Uncle Joe" had given in to his desire to possess Germany and all of Europe? In this stunning novel, Robert Conroy picks up the history of the war just as American troops cross the Elbe into Germany. Then Stalin slams them with the brute force of his enormous Soviet army.

Mars and the Moon have been colonized, piracy runs rampant in the asteroid belts, and a thriving society grows in the depths of space. Humanity prepares to embark upon its greatest journey - the colonization of Alpha Centauri. Then, everything changes. A deep space reconnaissance probe discovers a new Earth-like planet 12 light-years from Earth’s sun. The probe also finds something unusual, something unnerving. A new mission is created, a space fleet is formed, and humanity embarks on unravelling the greatest mystery of all - the origins of life itself.

September 1st, 1939. Germany invades Poland, igniting a major European war. A few months later, the French are also invaded, and the allied armies are utterly defeated. Then the Dunkirk disaster happens, and the United Kingdom loses most of its land army. Soon, the British Isles are also attacked, and the British are hard-pressed with a serious German invasion. The French struggle to resist the Axis forces bent on conquering all of their mainland home country and West African colonies.

The year is 1942. The world is at war. Almost every major nation has declared for the Allies or the Axis. Europe is occupied by the Third Reich, and the British Islands have been invaded and conquered by the Germans. Only one major power is still on the sideline. Imperial Japan, already busy in its war of conquest in China, dawns to the idea of conquering the Pacific and Southeast Asia, following German successes in Europe and the subsequent weakening of the resource-rich Franco-British and Dutch colonies.

The Communist Chinese leadership decides to move up their timetable to become the world’s sole superpower from 2049 to the present. Part of this is to unify Taiwan by force. They believe the best model for accomplishing their wider goals is to copy the comprehensive moves by Imperial Japan. The CCP/PLA thinks they can replicate the successes of the Japanese, while at the same time eliminating the failures. By means of subterfuge, they strike their East Asian neighbors, Western Pacific sea lanes, and the key American naval bases, relying on advanced missile and drone technology.

On their way to fight in the Mexican-American War, a group of American soldiers are swept away to a strange and deadly alternate Earth in this thrilling new adventure set in the world of the New York Times best-selling Destroyermen series.

The time is 1933, the place, Berlin, when William E. Dodd becomes America’s first ambassador to Hitler’s Germany in a year that proved to be a turning point in history. A mild-mannered professor from Chicago, Dodd brings along his wife, son, and flamboyant daughter, Martha. At first Martha is entranced by the parties and pomp, and the handsome young men of the Third Reich with their infectious enthusiasm for restoring Germany to a position of world prominence. Enamored of the “New Germany,” she has one affair after another....

Rudi Graf is an engineer who always dreamed of sending rockets to the moon. But instead, he finds himself working alongside Wernher von Braun, launching V2 rockets at London for the Nazis from a bleak seaside town in occupied Holland. As the SS increases its scrutiny of the project, Graf, an engineer more than a soldier, has to muster all of his willpower to toe the party line. And when rumors of a defector circulate through the German ranks, Graf becomes a prime suspect.