Deep in the Nevada desert is the most secure compound in the United States: Area 51. The most chilling experiment of all time is about to begin there. The president doesn't know about it. Just a few scientists and military personnel working for Majestic-12 do, and they are about to make a very big mistake.

Many millennia ago, humans, including us, were seeded on 15 worlds by an alien race, the Airlia. We believe we evolved, but the reality is we were bred as cannon fodder for the Airlia’s interstellar war against the Swarm, a viral race whose only mission appears to be the obliteration of sentient life wherever encountered. On some worlds humans realized the truth about their origins, uncovered their hidden alien overlords, and rebelled.

Hidden deep beneath the Metropolitan Museum of Art is the Time Patrol, a secret agency charged with protecting the world's timeline from the evil forces who wish to alter it. When the patrol disappears without a trace, only 12 short hours are left before all life on Earth ceases to exist.

An astonishing technique for recovering and cloning dinosaur DNA has been discovered. Now humankind’s most thrilling fantasies have come true. Creatures extinct for eons roam Jurassic Park with their awesome presence and profound mystery, and all the world can visit them - for a price.

From early work like "Rescue Party" and "The Lion of Comarre", through classic stories including "The Star", "Earthlight", "The Nine Billion Names of God", and "The Sentinel" (kernel of the later novel and movie 2001: A Space Odyssey), all the way to later work like "A Meeting with Medusa" and "The Hammer of God", this comprehensive short story collection encapsulates one of the great science fiction careers of all time.

With Earth in the path of the rapacious Posleen, the Galactic Federation offers help to the backward humans - for a price. You can protect yourself from your enemies, but God save you from your allies!

Kyle Riggs is snatched by an alien spacecraft sometime after midnight. The ship is testing everyone it catches and murdering the weak. The good news is that Kyle keeps passing tests and staying alive. The bad news is the aliens who sent this ship are the nicest ones out there.

A modern master of the historical novel, Jeff Shaara has painted brilliant depictions of the Civil War, the Revolutionary War, and World War I. Now he embarks upon his most ambitious epic, a trilogy about the military conflict that defined the 20th century. The Rising Tide begins a staggering work of fiction bound to be a new generation's most poignant chronicle of World War II.

Roger Ramius Sergei Chiang MacClintock was young, handsome, athletic, an excellent dresser, and third in line for the Throne of Man. So it wasn't surprising that he became spoiled, self-centered, and petulant. After all, what else did he have to do with his life?

From the towering heights of Olympos Mons on Mars, the mighty Zeus and his immortal family of gods, goddesses, and demigods look down upon a momentous battle, observing - and often influencing - the legendary exploits of Paris, Achilles, Hector, Odysseus, and the clashing armies of Greece and Troy. Thomas Hockenberry, former 21st-century professor and Iliad scholar, watches as well. It is Hockenberry's duty to observe and report on the Trojan War's progress to the so-called deities who saw fit to return him from the dead.

After returning from a campaign in the Third Afghan War, Major Thomas Waller and the Royal Newfoundland Regiment are assigned to escort two mysterious ladies into the unknown lands of the new world. With the help of an American drifter named Smith, Waller and his men must face daunting hordes of savages that roam the steppes of the alien planet, and help to uncover the ladies' secrets - and the secrets of the new world itself. A dangerous mission awaits on the Grasslands....

It's the spring of 1862. The Confederate Army in the West teeters on the brink of collapse following the catastrophic loss of Fort Donelson. Commanding general Albert Sidney Johnston is forced to pull up stakes, abandon the critical city of Nashville, and rally his troops in defense of the Memphis and Charleston Railroad. Hot on Johnston's trail are two of the Union's best generals: the relentless Ulysses Grant, fresh off his career-making victory at Fort Donelson, and Don Carlos Buell.

Following the initial Martian invasion of England, President Theodore Roosevelt tries to prepare the United States for the potential of another Martian incursion. As the possibility of a stronger invasion is increasingly clear, the US government tries to mobilize nations to share information and technology to defend humanity. Newly minted ordinance officer Andrew Comstock has been placed in charge of developing new technology that has to be tested on the fly in a race against time if humanity is to survive.

Boarding a transport ship after the Battle of Gettysburg, Colonel Andrew Keane and his 35th Maine regiment are swept into an alternate world. The first human civilization they encounter on this planet resembles medieval Russia, with boyars and priests ruling over the peasants and townspeople. Soon Keane and his regiment learn this world's terrible secret: that cannibalistic hordes of large, fierce Tugars circle the planet and demand tribute - including humans to be devoured.

In vivid, brilliant fiction that illuminates the dark psychology of soldiers, Jeff Shaara brings to life the familiar characters, stunning triumphs, and soul-crushing defeats of the fascinating, long-forgotten Mexican-American War.

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.

With Earth in the path of the rapacious Posleen, the Galactic Federation offers help to the backward humans - for a price. You can protect yourself from your enemies, but God save you from your allies!

As a MechWarrior of the Draconis Combine, Minobu Tetsuhara was bound by Bushido - a code that demands loyal service - to the devious Warlord Grieg Samsonov. But when Minobu came upon a strange blue-and-gold Archer, Bushido also dictated that he not destroy the honorable but helpless warrior. And so begins the BattleTech Chronicles, books one, two and three...

John O'Ryan is not a god...not exactly. He is an eternal warrior destined to combat the Dark Lord through all time for dominion of the Earth. Follow him, servant of a great race, as he battles his enemy down the halls of time, from the caves of our ancestors to the final confrontation under the hammer of nuclear annihilation.

Boarding a transport ship after the Battle of Gettysburg, Colonel Andrew Keane and his 35th Maine regiment are swept into an alternate world. The first human civilization they encounter on this planet resembles medieval Russia, with boyars and priests ruling over the peasants and townspeople. Soon Keane and his regiment learn this world's terrible secret: that cannibalistic hordes of large, fierce Tugars circle the planet and demand tribute - including humans to be devoured.

Following the initial Martian invasion of England, President Theodore Roosevelt tries to prepare the United States for the potential of another Martian incursion. As the possibility of a stronger invasion is increasingly clear, the US government tries to mobilize nations to share information and technology to defend humanity. Newly minted ordinance officer Andrew Comstock has been placed in charge of developing new technology that has to be tested on the fly in a race against time if humanity is to survive.

In this, the first volume of renowned author and historian Peter G. Tsouras’s alternative history trilogy, Great Britain’s support for the Confederacy takes it to the brink of war with the Union. The escape of a British-built Confederate ironclad finally ignites the heap of combustible animosities and national interests. When the US Navy seizes it in British waters, the ensuing battle spirals into all-out war. Napoleon III eagerly joins the British and declares war on the United States.

When second son Alexander Valentine loses his brother to an assassin's arrow, he discovers that his family protects an ancient secret and reluctantly finds himself at the center of the final battle of a war that was supposed to have ended two thousand years ago. Pursued by the dark minions of an ancient enemy, Alexander flees to the mountain city of Glen Morillian where he discovers that he is the heir to the throne of Ruatha, one of the Seven Isles, but before he can claim the throne he must recover the ancient Thinblade.

Set in a world in which the Roman Empire never fell, Clash of Eagles finds Praetor Gaius Marcellinus leading his 33rd Legion into Nova Hesperia. But there his conception of the world is challenged by encounters with the Powhatani, Iroqua, and Cahokiani tribes.

It is December 1878, and war looms on the horizon in South Africa. British high commissioner Sir Henry Bartle-Frere seeks to dismantle the powerful neighboring kingdom of the Zulus and uses an incursion along the disputed border as his justification for war. He issues an impossible ultimatum to the Zulu king, Cetshwayo, demanding he disband his armies and pay massive reparations. With a heavy heart, the king prepares his nation for war against their former allies.

It is 58 BC, and the mighty Tenth Legion, camped in Northern Italy, prepare for the arrival of the most notorious general in Roman history: Julius Caesar. Marcus Falerius Fronto, commander of the Tenth, is a career soldier and long-time companion of Caesar's. Despite his desire for the simplicity of the military life, he cannot help but be drawn into intrigue and politics as Caesar engineers a motive to invade the lands of Gaul.

Seventy thousand years ago, the human race almost went extinct. We survived, but no one knows how.

Until now. The countdown to the next stage of human evolution is about to begin, and humanity might not survive this time. The Immari are good at keeping secrets. For 2,000 years, they've hidden the truth about human evolution. They've also searched for an ancient enemy - a threat that could wipe out the human race. Now the search is over.

Archaeologists Pippa Quinn and Charlie Jackson find advanced technology in undisturbed 16th-century graves. A portent, the discovery precedes thousands of giant sinkholes opening up across the globe as extreme weather threatens the population. Charlie suspects the two are related.

In the year 2280, an alien fleet attacked the Earth. Their weapons were unstoppable, their defenses unbreakable. Our technology was inferior, our militaries overwhelmed. Only one starship escaped before civilization fell. Earth was lost. It was never forgotten. Fifty-two years have passed. A message from home has been received. The time to fight for what is ours has come.

After seven long years of conflict, the Horus Heresy nears its end. But now, as the Warmaster Horus marches on Terra to rip his father from the Throne, the seat of the arch-traitor’s power lies empty. Cthonia, a world once dominated by brutal murder-gangs, is occupied by the Emperor’s praetorians—the indomitable Imperial Fists. For the Sons of Horus, this outrage demands a reckoning.