They are recruited by an agency that no one knows exists, with only one purpose—to fix broken history. Because time travel is here, and there are those who would go back in time and change the past. That’s why the TimeRiders exist: to protect us. To stop time travel from destroying the world...

    The sole legacy of that war was the weapon that ended it: the death machines, the BERSERKERS. Guided by self-aware computers more intelligent than any human, these world-sized battlecraft carved a swath of death through the galaxy--until they arrived at the outskirts of the fledgling Empire of Man.These are the stories of the frail creatures who must meet this monstrous and implacable enemy--and who, by fighting it to a standstill, become the saviors of all living things.

    The same aliens who almost destroyed Earth once are coming back to get the whole job done this time. But we aren't going to just sit and die. The international military is taking our best and brightest to mold them into the finest military minds ever - and they're taking them young.

    In "Exhalation," an alien scientist makes a shocking discovery with ramifications that are literally universal. In "Anxiety Is the Dizziness of Freedom," the ability to glimpse into alternate universes necessitates a radically new examination of the concepts of choice and free will.Including stories being published for the first time as well as some of his rare and classic uncollected work, Exhalation is Ted Chiang at his best: profound, sympathetic—revelatory.

    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's blood-and, against her parents' objections, she enlists in the marines.

    FDR's New Deal has redefined American politics. Taxes are at an all-time high. The bombing of Hiroshima and Nagasaki has brought a fear of total annihilation. The rise of secret government agencies and sanctions on business has many watching their backs. America's sense of freedom is diminishing . . . and many are desperate to take that freedom back.Among them is a great dreamer, an immigrant who pulled himself from the depths of poverty to become one of the wealthiest and admired men in the world. That man is Andrew Ryan, and he believed that great men and women deserve better. And so he set out to create the impossible, a utopia free from government, censorship, and moral restrictions on science--where what you give is what you get. He created Rapture---the shining city below the sea.But as we all know, this utopia suffered a great tragedy. This is the story of how it all came to be . . .and how it all ended.

    The next minute, they're in a horse-drawn cart surrounded by soldiers pointing crossbows at them. Tim now has the voice and physique of a prepubescent girl. Dave finds that while he lost a foot or two in height, he somehow acquired a suit of armor and a badass beard. Julian's ears have grown ridiculously long and pointy. And Cooper... well Cooper has gotten himself a set of tusks, a pair of clawed hands, and a bad case of the shits. He also finds that he's carrying a bag with a human head in it - a head that he had chopped off when they were still just playing a game.Shit just got real, and if they want to survive, these four friends are going to have to tap into some baser instincts they didn't even know existed in their fast-food and pizza delivery world.It's fight, flight, or try to convince the people who are trying to kill them that they don't really exist.Meanwhile, a sadistic game master sits back in the real world eating their fried chicken.

    One survivor, strangely immune to the effects of the epidemic, ventures forward to experience a world without man. What he ultimately discovers will prove far more astonishing than anything he'd either dreaded or hoped for.