The Edge of the Knife, by H Beam Piper is one of the pivotal not felt was by Piper in his "Terra-Human Future History". Piper wrote this novella in 1957 at the height of the Cold War between the Soviet Union, and the United States of America, and seeing into the future could get you locked up in the sanitarium for dissolution all thinking. The protagonist, Charmers, a modern history professor has just such a problem.

A galactic war has left the Terran Federation in ruins. Formerly civilized planets have decivilized into barbarism. Space Vikings roam the wreckage, plundering and killing for gain. Lord Lucas Trask of Traskon was no admirer of the Space Vikings, but when murder takes his wife on his wedding day, Trask trades everything he has for his own Space Viking ship and sets out on a galaxy-wide quest for revenge.

So the Ulleran challenge begins, with the rantings of a prophet and a seemingly incidental street riot. Only when a dose of poison lands in the governer-general's whiskey does it become clear that the "geeks" have had it up their double-lidded eyeballs with the imperialist Terran Federation's Chartered Uller Company. Then, overnight, war is everywhere.

New York Times best-selling author Eric Flint has received glowing critical praise for his Ring of Fire alternate history series. In this first installment, a West Virginia town is transported from the year 2000 to 1631 Germany at the height of the Thirty Years’ War. Thrust into conflict, the town residents must also contend with moral issues such as who should be considered a citizen.

In what is considered one of Heinlein's most hair-raising, thought-provoking, and outrageous adventures, the master of modern science fiction tells the strange story of an even stranger world. It is 21st-century Luna, a harsh penal colony where a revolt is plotted between a bashful computer and a ragtag collection of maverick humans, a revolt that goes beautifully until the inevitable happens. But that's the problem with the inevitable: it always happens.

The gigantic comet had slammed into Earth, forging earthquakes a thousand times too powerful to measure on the Richter scale, tidal waves thousands of feet high. Cities were turned into oceans; oceans turned into steam. It was the beginning of a new Ice Age and the end of civilization. But for the terrified men and women chance had saved, it was also the dawn of a new struggle for survival--a struggle more dangerous and challenging than any they had ever known....

Imperial Intelligence couldn't find them, the Imperial Fleet couldn't catch them, and local defenses couldn't stop them. It seemed the planet-wrecking pirates were invincible. But they made a big mistake when they raided ex-commando leader Alicia DeVries' quiet home/work, tortured and murdered her family, and then left her for dead. Alicia decided to turn "pirate" herself, and stole a cutting-edge AI ship from the empire to start her vendetta. Her fellow veterans think she's gone crazy, the Imperial Fleet has shoot-on-sight orders. And, of course, the pirates want her dead, too.

For Lt. Commander Colin Maclntyre, it began as a routine training flight over the moon. For Dahak, a self-aware Imperial battleship, it began millennia ago when that powerful artificial intelligence underwent a mutiny in the face of the enemy. The mutiny was never resolved - Dahak was forced to maroon not just the mutineers but the entire crew on prehistoric Earth.

The Mote In God's Eye is their acknowledged masterpiece, an epic novel of mankind's first encounter with alien life that transcends the genre. No lesser an authority than Robert A. Heinlein called it "possibly the finest science fiction novel I have ever read".

Spacers call the warp point Charon's Ferry. No star ship has ever entered it and returned since a vengeful Orion task force pursued a doomed Terran colonization fleet into it in 2206. Almost a century has passed. The fiery hatreds of a quarter-century of warfare between the Terran Federation and the Zheeerlikou'valkhannaieeee, the cat-like species humans called the "Orions", have eased at least a little.

The best-selling, epic space adventure, Freedom's Fire: the complete series of six audiobooks, in one bundle.

In the year AD 3000, Earth is a dystopian wasteland, plundered of its natural resources by alien conquerors known as Psychlos. Fewer than 35,000 humans survive in a handful of communities scattered across the face of a post-apocalyptic Earth. From the ashes of humanity rises a young hero, Jonnie Goodboy Tyler. Setting off on an initial quest to discover a hidden evil, Jonnie unlocks the mystery of humanity’s demise and unearths a crucial weakness in their oppressors.

In 1942, Lawrence Pritchard Waterhouse - mathematical genius and young Captain in the US Navy - is assigned to detachment 2702. It is an outfit so secret that only a handful of people know it exists, and some of those people have names like Churchill and Roosevelt. The mission of Watrehouse and Detachment 2702 - commanded by Marine Raider Bobby Shaftoe - is to keep the Nazis ignorant of the fact that Allied Intelligence has cracked the enemy's fabled Enigma code. In the present, Waterhouse's crypto-hacker grandson, Randy, is attempting to create a "data haven" in Southeast Asia....

William Mandella is a soldier in Earth's elite brigade. As the war against the Taurans sends him from galaxy to galaxy, he learns to use protective body shells and sophisticated weapons. He adapts to the cultures and terrains of distant outposts. But with each month in space, years are passing on Earth. Where will he call home when (and if) the Forever War ends?

Jim Marlowe and his strange-looking Martian friend, Willis, are allowed to travel only so far. But one day Willis unwittingly tunes in to a treacherous plot that threatens all the colonists on Mars, and it sets Jim off on a terrifying adventure that could save - or destroy - them all.

Fenris isn't a hell planet, but it's nobody's bargain. With 2,000-hour days and an 8,000-hour year, it alternates blazing heat with killing cold. A planet like that tends to breed a special kind of person: tough enough to stay alive and smart enough to make the best of it. And when that kind of person discovers he's being cheated out of wealth he's risked his life for, that kind of planet is ripe for revolution.

They first appear as a series of dots on astronomical plates, heading from Saturn directly toward Earth. Since the ringed planet carries no life, scientists deduce the mysterious ship to be a visitor from another star. The world's frantic efforts to signal the aliens go unanswered. The first contact is hostile: the invaders blast a Soviet space station, seize the survivors, and then destroy every dam and installation on Earth with a hail of asteriods.

In what is considered one of Heinlein's most hair-raising, thought-provoking, and outrageous adventures, the master of modern science fiction tells the strange story of an even stranger world. It is 21st-century Luna, a harsh penal colony where a revolt is plotted between a bashful computer and a ragtag collection of maverick humans, a revolt that goes beautifully until the inevitable happens. But that's the problem with the inevitable: it always happens.

They are the Voltarians of Voltar - an empire 110 planets strong. They are already among us. And the invasion is about to begin...in a hundred years or so. Or is it? The truth is far more sinister. Undercover, underground, and out of sight, the invaders plan what may in fact be a massive diversion. In the darkest recesses of Voltar’s Coordinated Information Apparatus (otherwise known as the CIA), a tyrant of terror sets out to exploit the invasion in order to seize power. All that stands in his way is a planet that doesn’t exist.

Robert A. Heinlein has been hailed as one of the most forward-thinking science fiction writers of all time, and Expanded Universe (presented in two volumes) offers the perfect collection of his works to provide listeners with true insights into his uniquely creative mind.

How far is too far? Alan Corday is about to find out. Corday is shanghaied aboard a craft bound for the stars...on a journey at the speed of light, the world he leaves behind fast vanishing into the past. And nothing in the dark, forbidding reaches of space can prepare him for the astounding discovery he will make upon his return from the stars.

The Year is 2040. The Marines have landed on Mars to guard the unearthed secrets of an ancient and dangerous alien race: Ourselves. Scientists have discovered something astonishing in the subterranean ruins of a sprawling Martian city: startling evidence of an alternative history that threatens to split humanity into opposing factions and plunge the Earth into chaos and war.

Kris Longknife is a daughter of privilege, born to money and power. Her father is the prime minister of her home planet, her mother the consummate politician's wife. She's been raised only to be beautiful and marry well. But the heritage of the military Longknifes courses through Kris' blood - and, against her parents' objections, she enlists in the Marines.

The Mote In God's Eye is their acknowledged masterpiece, an epic novel of mankind's first encounter with alien life that transcends the genre. No lesser an authority than Robert A. Heinlein called it "possibly the finest science fiction novel I have ever read".

Brilliant government scientist Richard Seaton discovers a remarkable faster-than-light fuel that will power his interstellar spaceship, The Skylark. His ruthless rival, Marc DuQuesne, and the sinister World Steel Corporation will do anything to get their hands on the fuel. They kidnap Seaton's fiancée and friends, unleashing a furious pursuit and igniting a burning desire for revenge that will propel The Skylark across the galaxy and back.

Hybrid fighters merging human and alien technology. Massive cannon emplacements on the moon and Mars. A planetary defense force with the finest military personnel ever trained. For two decades we've known the enemy would return. The nations of Earth have collaborated on a unified defense program designed to defend the planet.

Humans call them Monument-Makers. An unknown race, they left stunning alien statues scattered on distant planets throughout the galaxy, encoded with strange inscriptions that defy translation. Searching for clues about the Monument-Makers, teams of 23rd century linguists, historians, engineers and archaeologists have been excavating the enigmatic alien ruins on a number of planets, uncovering strange, massive false cities made of solid rock. But their time is running out.

Jan Kulozik was one of Earth's privileged elite. A brilliant young electronics engineer, he enjoyed all the blessings of a twenty-third-century civilization that survived global collapse and conquered the starts, unaware of the millions who slaved or starved to maintain his way of life. Then Jan met Sara, a beautiful agent of the rebel underground dedicated to smashing Earth's rigid caste system. Through her he discovered the truth behind the lies he'd been taught.

Everyone knew the legend of Christopher Sim. Fighter. Leader. An interstellar hero with a rare talent for war, Sim changed mankind's history forever when he forged a ragtag group of misfits into the weapon that broke the back of the alien Ashiyyur. But now, Alex Benedict has found a startling bit of information, long buried in an ancient computer file. If it is true, then Christopher Sim was a fraud.

In the future, the terminally ill can prolong life by surrendering their consciousness to a cybernetic life form that is then recruited into the notorious Legion of the Damned, an elite fighting unit charged with protecting humanity.