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.

This classic science fiction masterwork by Isaac Asimov weaves stories about robots, humanity, and the deep questions of existence into a novel of shocking intelligence and heart.

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.