But it all becomes horrifyingly real when a murder in the past destroys the foundation of Kate’s present-day life. Suddenly, that medallion is the only thing protecting Kate from blinking out of existence.Kate learns that the 1893 killing is part of something much more sinister, and Kate’s genetic ability to time-travel makes her the only one who can stop him. Risking everything, she travels to the Chicago World’s Fair to try to prevent the killing and the chain of events that follows.Changing the timeline comes with a personal cost, however—if Kate succeeds, the boy she loves will have no memory of her existence. And regardless of her motives, does she have the right to manipulate the fate of the entire world?

    He hadn't planned it that way, but that's what happened when he set out to rescue his betrothed. Following her through an erratic astral-projection machine, Jim suddenly found himself in a cockeyed world - locked in the body of a talking dragon named Gorbash.That wouldn't have been so bad if his beloved Angie were also a dragon. But in this magical land, that was not the case. Angie had somehow remained a very female human - or a george, as the dragons called any human. And Jim, no matter what anyone called him, was a dragon.To make matters worse, Angie had been taken prisoner by an evil dragon and was held captive in the impenetrable Loathly Tower. So in this land where georges were edible and beasts were magical - where spells worked and logic didn't - Jim Eckert had a problem.And he needed help, by george!

    E. van Vogt was one of the giants of the 1940s, the Golden Age of classic SF. Of his masterpieces, The World of Null-A is his most famous and most influential. Published in 1949 it was the first major trade SF hardcover, and has been in print in various editions ever since. The entire careers of Philip K. Dick, Keith Laumer, Alfred Bester, Charles Harness, and Philip Jose Farmer were created or influenced by The World of Null-A, and so it is required reading for anyone who wishes to know the canon of SF classics.It is the year 2650 and Earth has become a world of non-Aristotelianism, or Null-A. This is the story of Gilbert Gosseyn, who lives in that future world where the Games Machine, made up of twenty-five thousand electronic brains, sets the course of people's lives. Gosseyn isn't even sure of his own identity, but realizes he has some remarkable abilities and sets out to use them to discover who has made him a pawn in an interstellar plot.

    Over the centuries, cities and governments have risen and fallen beyond the concent's walls. Three times during history's darkest epochs violence born of superstition and ignorance has invaded and devastated the cloistered mathic community. Yet the avout have always managed to adapt in the wake of catastrophe, becoming out of necessity even more austere and less dependent on technology and material things. And Erasmas has no fear of the outside—the Extramuros—for the last of the terrible times was long, long ago.Now, in celebration of the week-long, once-in-a-decade rite of Apert, the fraas and suurs prepare to venture beyond the concent's gates—at the same time opening them wide to welcome the curious "extras" in. During his first Apert as a fraa, Erasmas eagerly anticipates reconnecting with the landmarks and family he hasn't seen since he was "collected." But before the week is out, both the existence he abandoned and the one he embraced will stand poised on the brink of cataclysmic change.Powerful unforeseen forces jeopardize the peaceful stability of mathic life and the established ennui of the Extramuros—a threat that only an unsteady alliance of saecular and avout can oppose—as, one by one, Erasmas and his colleagues, teachers, and friends are summoned forth from the safety of the concent in hopes of warding off global disaster. Suddenly burdened with a staggering responsibility, Erasmas finds himself a major player in a drama that will determine the future of his world—as he sets out on an extraordinary odyssey that will carry him to the most dangerous, inhospitable corners of the planet . . . and beyond.

    But instead of acclaim, Grady’s lab is locked down by a covert organization known as the Bureau of Technology Control.The bureau’s mission: suppress the truth of sudden technological progress and prevent the social upheaval it would trigger. Because the future is already here. And it’s rewards are only for a select few.When Grady refuses to join the BTC, he’s thrown into a nightmarish high-tech prison housing other doomed rebel intellects. Now, as the only hope to usher humanity out of its artificial dark age, Grady and his fellow prisoners must try to expose the secrets of an unimaginable enemy—one that wields a technological advantage half a century in the making.

    When he and his crew stumble upon a derelict ship, the Scopuli, they find themselves in possession of a secret they never wanted. A secret that someone is willing to kill for—and kill on a scale unfathomable to Jim and his crew. War is brewing in the system unless he can find out who left the ship and why.Detective Miller is looking for a girl. One girl in a system of billions, but her parents have money and money talks. When the trail leads him to the Scopuli and rebel sympathizer Holden, he realizes that this girl may be the key to everything.Holden and Miller must thread the needle between the Earth government, the Outer Planet revolutionaries, and secretive corporations—and the odds are against them. But out in the Belt, the rules are different, and one small ship can change the fate of the universe.

    Now people unquestioningly accept the Tripods' power. They have no control over their thoughts or their lives.But for a brief time in each person's life—in childhood—he is not a slave. For Will, his time of freedom is about to end—unless he can escape to the White Mountains, where the possibility of freedom still exists.

    So how is it that, in competition with the worst villains the universe has to offer, he's become the proud owner of the last seedship of Earth's legendary Ecological Engineering Corps? Never mind, just be thankful that the most powerful weapon in human space is in good hands-hands which now control cellular material for thousands of outlandish creatures. With his unique equipment, Tuf is set to tackle the problems human settlers have created in colonizing far-flung worlds: hosts of hostile monsters, a population hooked on procreation, a dictator who unleashes plagues to get his own way...and in every case the only thing that stands between the colonists and disaster is Tuf's ingenuity - and his reputation as an honest dealer in a universe of rogues...Tuf Voyaging features interior illustrations by Janet Aulisio. Included in it will be her original eight illustrations, along with 28 newly commissioned ones.

    The work of English clergyman, educator and Shakespearean scholar Edwin A. Abbott (1838-1926), it describes the journeys of A. Square [sic – ed.], a mathematician and resident of the two-dimensional Flatland, where women-thin, straight lines-are the lowliest of shapes, and where men may have any number of sides, depending on their social status.Through strange occurrences that bring him into contact with a host of geometric forms, Square has adventures in Spaceland (three dimensions), Lineland (one dimension) and Pointland (no dimensions) and ultimately entertains thoughts of visiting a land of four dimensions—a revolutionary idea for which he is returned to his two-dimensional world. Charmingly illustrated by the author, Flatland is not only fascinating reading, it is still a first-rate fictional introduction to the concept of the multiple dimensions of space. "Instructive, entertaining, and stimulating to the imagination." — Mathematics Teacher.

    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. Nobody knows what strange force partitioned space into these "regions of thought," but when the warring Straumli realm use an ancient Transcendent artifact as a weapon, they unwittingly unleash an awesome power that destroys thousands of worlds and enslaves all natural and artificial intelligence.Fleeing the threat, a family of scientists, including two children, are taken captive by the Tines, an alien race with a harsh medieval culture, and used as pawns in a ruthless power struggle. A rescue mission, not entirely composed of humans, must rescue the children-and a secret that may save the rest of interstellar civilization.

    But now a new and very mysterious employer recruits him for a last-chance run. The target: an unthinkably powerful artificial intelligence orbiting Earth in service of the sinister Tessier-Ashpool business clan. With a dead man riding shotgun and Molly, mirror-eyed street-samurai, to watch his back, Case embarks on an adventure that ups the ante on an entire genre of fiction.The winner of the Hugo, Nebula, and Philip K. Dick Awards, Neuromancer was the first fully-realized glimpse of humankind’s digital future—a shocking vision that has challenged our assumptions about our technology and ourselves, reinvented the way we speak and think, and forever altered the landscape of our imaginations.

    It is the tale of young Severian, an apprentice in the Guild of Torturers on the world called Urth, exiled for committing the ultimate sin of his profession - showing mercy toward his victim - and follows his subsequent journey out of his home city of Nessus.

    How do you break time? Can something so bad happen that you fracture the world?" Benjamin Travers has been electrocuted. What's worse, he and his friends have woken up in the past. As the friends search for a way home, they realize they're not alone. There are other time travelers, and some of them are turning up dead. When Ben meets an enigmatic scientist and his charming, time-traveling daughter, salvation seems at hand, but escaping the dangers of the past may lead to a deadly future. If he hopes to save his friends, Ben must learn to master space and time, and survive a journey where past and future violently collide.

    And she’ll occasionally put on a cool suit and beat up bad guys, if she feels like it.When the archrivals meet in a memory-loss support group, they realize the only way to reveal their hidden pasts might be through each other. As they uncover an ongoing threat, suddenly much more is at stake than their fragile friendship. With countless people at risk, Zoe and Jamie will have to recognize that sometimes being a hero starts with trusting someone else—and yourself.

    From here the story spans centuries of ignorance, violence, and barbarism, viewing through a sharp, satirical eye the relentless progression of a human race damned by its inherent humanness to recelebrate its grand foibles and repeat its grievous mistakes.