The Overlords appeared suddenly over every city - intellectually, technologically, and militarily superior to humankind. Benevolent, they made few demands: unify earth, eliminate poverty, and end war. With little rebellion, humankind agreed, and a golden age began.

In the 1800s, a sailing ship crashes off the coast of Norway. In the 1900s, a Zepellin explores an icy canyon in Antarctica. In the far future, a spaceship sets out for an alien artifact. Each excursion goes horribly wrong. And on every journey, Dr. Silas Coade is the physician, but only Silas seems to realize that these events keep repeating themselves. And it's up to him to figure out why and how. And how to stop it all from happening again.

In an alternate world where the Dark Ages never ended, "the Evil" that arises every 500 years has prevented all manner of technological advancement, even well into the 20th century. The son of a powerful English noble, young Duncan Standish has always longed to be a soldier of the Lord, and now he's been offered a rare opportunity to fulfill his dream.

The hunt for his killer leads a dead professor of supernatural phenomena into the perilous intrigues of aliens, fairy folk, and time travelers in this classic of science fiction. Until the day he was murdered, Professor Peter Maxwell was a respected faculty member of the College of Supernatural Phenomena. Imagine his chagrin when he turns up at a Wisconsin matter transmission station several weeks later and discovers he's not only dead but unemployed.

Jenkins was a robot. He was built to be the perfect worker, tireless and uncomplaining. But, quite unexpectedly, he also became a close companion to generation after generation of his owners as the human race matured, moved beyond the confines of its once tiny planet, and eventually changed beyond all recognition.

When Lenina and Bernard visit a savage reservation, we experience how Utopia can destroy humanity. Cloning, feel-good drugs, anti-aging programs, and total social control through politics, programming, and media: has Aldous Huxley accurately predicted our future? With a storyteller's genius, he weaves these ethical controversies in a compelling narrative that dawns in the year 632 A.F. (After Ford, the deity). When Lenina and Bernard visit a savage reservation, we experience how Utopia can destroy humanity.

A Fire Upon the Deep is the big, breakout book that fulfills the promise of Vinge's career to date: a gripping tale of galactic war told on a cosmic scale. Thousands of years hence, many races inhabit a universe where a mind's potential is determined by its location in space, from superintelligent entities in the Transcend, to the limited minds of the Unthinking Depths, where only simple creatures and technology can function.

Adrian Tchaikovksy's critically acclaimed stand-alone novel Children of Time is the epic story of humanity's battle for survival on a terraformed planet. Who will inherit this new Earth? The last remnants of the human race left a dying Earth, desperate to find a new home among the stars. Following in the footsteps of their ancestors, they discover the greatest treasure of the past age - a world terraformed and prepared for human life. But all is not right in this new Eden.

For thousands of years, Carter Horton has been traveling across the galaxy toward a distant world capable of supporting human life. At journey's end, awakened from his millennia-long sleep by a curiously adaptive android, he is informed that his crewmates have all perished due to a system malfunction. But worse is yet to come: Horton's sentient ship is refusing to return him to Earth, and a strangely cordial predator is waiting for him on the planet's surface.

They mustn't harm a human being, they must obey human orders, and they must protect their own existence...but only so long as that doesn't violate rules one and two. With these Three Laws of Robotics, humanity embarked on a bold new era of evolution that would open up enormous possibilities, and unforeseen risks.

Following a conversation with a talking slot machine, Professor Edward Lansing finds himself mysteriously transported to a tavern on a long and empty road. It is immediately obvious to the educator that he is no longer on campus - or even Earth - and that he is not alone. Lansing's new companions - a female engineer, a military officer, a humorless priest, a poetess, and a robot named Jurgens - all hail from separate alternate realities and share Lansing's confusion.

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?

Winner of the Nebula Award for Best Novel, Red Mars is the first book in Kim Stanley Robinson's best-selling trilogy. Red Mars is praised by scientists for its detailed visions of future technology. It is also hailed by authors and critics for its vivid characters and dramatic conflicts.

For centuries, the red planet has enticed the people of Earth. Now an international group of scientists has colonized Mars. Leaving Earth forever, these 100 people have traveled nine months to reach their new home. This is the remarkable story of the world they create - and the hidden power struggles of those who want to control it.

Geophysicist Jack Greer believes he may finally have found the resting place of the meteorite that wiped out the dinosaurs 65 million years ago. A few miles off the Yucatán coast, Jack and a team of scientists tow an aging drilling platform over the impact crater with the aim of securing a sample. But buried deep beneath the earth lies a shocking discovery that threatens to shatter everything we think we know about our species.

In a future world racked by violence and environmental catastrophes, George Orr wakes up one day to discover that his dreams have the ability to alter reality. He seeks help from Dr. William Haber, a psychiatrist who immediately grasps the power George wields. Soon George must preserve reality itself as Dr. Haber becomes adept at manipulating George's dreams for his own purposes.

Space travel has been abandoned in the 22nd century. It is deemed too dangerous, expensive, and inconvenient - and now the all-powerful Fishhook company holds the monopoly on interstellar exploration for commercial gain. Their secret is the use of "parries", human beings with the remarkable telepathic ability to expand their minds throughout the universe.

The profoundly original and wildly entertaining short stories of a legendary Twilight Zone writer. It is only natural that Charles Beaumont would make a name for himself crafting scripts for The Twilight Zone - for his was an imagination so limitless it must have emerged from some other dimension. Perchance to Dream contains a selection of Beaumont's finest stories, including five that he later adapted for Twilight Zone episodes.

What happens after the bombs drop? This is the troubling question Philip K. Dick addresses with Dr. Bloodmoney, or How We Got Along After the Bomb. It is the story of a world reeling from the effects of nuclear annihilation and fallout, a world where mutated humans and animals are the norm, and the scattered survivors take comfort from a disc jockey endlessly circling the globe in a broken-down satellite.

Two masters of science fiction collaborate on one wild post-apocalyptic story. After World War III, the Servants of Wrath cult deified the mysterious Carlton Lufteufel, creator of the doomsday weapon that wiped out much of humanity. But to worship the man, they need an image of him as a god, and no one has ever seen him. So the high priests send a limbless master painter named Tibor McMasters into the wilderness on a mission to find Lufteufel and capture his likeness.

Ed Fletcher is a real estate agent with a normal life, until one day he leaves the house for work a few minutes later than he should have. He arrives at a terrifying, grey, ash world. Ed rushes home and tells his wife, Ruth, who goes back to the office with him. When they return, everything is normal. But he soon realizes people and objects have subtly changed.

Seconds before the Earth is demolished to make way for a galactic freeway, Arthur Dent is plucked off the planet by his friend Ford Prefect, a researcher for the revised edition of The Hitchhiker's Guide to the Galaxy who, for the last 15 years, has been posing as an out-of-work actor.

N. K. Jemisin is one of the most powerful and acclaimed speculative fiction authors of our time. In the first collection of her evocative short fiction, Jemisin equally challenges and delights listeners with thought-provoking narratives of destruction, rebirth, and redemption.

Mad scientists have never had it so tough. In super-hero comics, graphic novels, films, TV series, video games, and even works of what may be fiction, they are besieged by those who stand against them, devoid of sympathy for their irrational, megalomaniacal impulses to rule, destroy, or otherwise dominate the world as we know it. It’s just not fair. So those of us who are so twisted and sick that we love mad scientists have created this guide.

Earth is being invaded by the shetani - spirit creatures so small and stealthy that only one man knows about the increasing peril. The potential savior is an African elder named Olkeloki who is capable of fighting evil both in this world and the spirit one. But to be successful he must recruit the help of two others: government agent Joshua Oak, and a feisty young woman named Merry Sharrow. Only the three of them can keep the shetani from destroying reality as we know it.

Professor James Lowry didn’t believe in spirits, or witches, or demons. Not until a gentle spring evening when his hat disappeared, and suddenly he couldn’t remember the last four hours of his life. Now, the quiet university town of Atworthy is changing - slightly at first, then faster and more frighteningly each time he tries to remember.

Guy Montag is a fireman. In his world, where television rules and literature is on the brink of extinction, firemen start fires rather than put them out. His job is to destroy the most illegal of commodities, the printed book, along with the houses in which they are hidden. Montag never questions the destruction and ruin his actions produce, returning each day to his bland life and wife, Mildred, who spends all day with her television "family."

Bradbury's Mars is a place of hope, dreams, and metaphor - of crystal pillars and fossil seas - where a fine dust settles on the great, empty cities of a silently destroyed civilization. It is here the invaders have come to despoil and commercialize, to grow and to learn - first a trickle, then a torrent, rushing from a world with no future toward a promise of tomorrow. The Earthman conquers Mars...and then is conquered by it, lulled by dangerous lies of comfort and familiarity, and enchanted by the lingering glamour of an ancient, mysterious native race.

What could be more commonplace than grass or a world covered over all its surface with a wind-whipped ocean of grass? But the planet Grass conceals horrifying secrets within its endless pastures. And as an incurable plague attacks all inhabited planets but this one, the prairie-like Grass begins to reveal these secrets - and nothing will ever be the same again.

This is the way the world ends: with a nanosecond of computer error in a Defense Department laboratory and a million casual contacts that form the links in a chain letter of death. And here is the bleak new world of the day after: a world stripped of its institutions and emptied of 99 percent of its people. A world in which a handful of panicky survivors choose sides - or are chosen.

It is 2019. NASA astronaut Nigel Walmsley is sent on a mission to intercept a rogue asteroid on a collision course with Earth. Ordered to destroy it, he instead discovers that it is actually the shell of a derelict space probe - a wreck with just enough power to emit a single electronic signal….

Others have written science fiction on the theme of immortality, but in The Boat of a Million Years, Poul Anderson made it his own. Early in human history, certain individuals were born who live on—unaging, undying—through the centuries and millennia. This story follows them over two thousand years, up to our time and beyond—to the promise of utopia, and to the challenge of the stars.

This science fiction novel describes the epic voyage of the spacecraft Leonora Christine. From practically the very first minute, Tau Zero sets scientific realities in dramatic tension with the very real emotional and psychological states of the travelers, exploring the effect of time contraction due to traveling at near-light speed on the human psyche. This tension is a dynamic that Anderson explores with great success over the course of the novel, as 50 crewmembers settle in for the long journey together.

In this hectic world we call modern society, it's become more and more important to find effective ways to relax and restore and find balance within ourselves. This Genius Brain Power Guided Meditation was designed to assist the listener in gaining a sharp, focused, and expansive state of mind using sound wave therapy ("Binaural Beats"), expertly crafted with relaxing music and sounds of nature.

The virtual persona of a long-dead visionary entrepreneur threatens to incite a revolution from space that could topple Earth's powerful and repressive religious-technological dictatorship in this ingenious science-fiction classic.

For 1,000 years, mankind has lived under the threat of invasion from an alien race. After the oceans rose and the continents were reshaped, people divided into guilds - Musicians, Scribes, Merchants, Clowns, and more. The Watchers wander the Earth, scouring the skies for signs of enemies from the stars. But during one Watcher's journey to the ancient city of Roum with his companion, a Flier named Avluela, a moment of distraction allows the invaders to advance. When the Watcher finally sounds the alarm, it's too late: the star people are poised to conquer all.