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One of three stories inspired by the same painting by Richard Anderson. Anthologized in The Anderson Project.

Ken Liu is among the most prominent new award-winning SF writers of the last decade, and this vision of a really uncanny alien invasion set in Boston, MA, is a stunner, with echoing reverberations, of love, identity, resistance and revolution.

This story can also be found in the anthology Worlds Seen in Passing: Ten Years of Tor.com Short Fiction (2018), edited by Irene Gallo, and Not One of Us: Stories of Aliens on Earth (2018), edited by Neil Clarke.

Read this story online for free at Tor.com.

When two immortals meet in the long-ago past, the destiny of mankind is changed forever.

For a thousand years, Doro has cultivated a small African village, carefully breeding its people in search of seemingly unattainable perfection. He survives through the centuries by stealing the bodies of others, a technique he has so thoroughly mastered that nothing on Earth can kill him. But when a gang of New World slavers destroys his village, ruining his grand experiment, Doro is forced to go west and begin anew.

He meets Anyanwu, a centuries-old woman whose means of immortality are as kind as his are cruel. She is a shapeshifter, capable of healing with a kiss, and she recognizes Doro as a tyrant. Though many humans have tried to kill them, these two demi-gods have never before met a rival. Now they begin a struggle that will last centuries and permanently alter the nature of humanity.

The complete Patternist series – Butler’s acclaimed vision of a world transformed by a secret race of telepaths and the violence, intolerance, and plague that follow their rise to power.

In the late seventeenth century, two immortals meet in an African forest. Anyanwu is a healer, a three-hundred-year-old woman who uses her wisdom to help those around her. The other is Doro, a malevolent despot who has mastered the power of stealing the bodies of others when his wears out. Together they will change the world.

Hugo- and Nebula-winning Novella

In Tiptree's most famous and most reprinted story, a US spacecraft with an all-male crew is thrown forward in time to an Earth where all men have died from a plague.

This story was collected in Star Songs of an Old Primate (1978) and Her Smoke Rose Up Forever (1990), and anthologized in Aurora: Beyond Equality (1976), The 1977 Annual World's Best SF (1977), Nebula Winners Twelve (1978), The Arbor House Treasury of Great Science Fiction Short Novels (1980), The Hugo Winners, Volume 4 (1985), The Best of the Nebulas (1989), and as one half of Tor Double #11 (1989).

Listen to a radio play of this story at the Sci-Fi Radio archive (#17).

A secluded Pacific Northwest cottage becomes a door to the past for Tom Winter, who travels back to the New York City of 1962, followed by a human killing machine that he alone must stop.

The fourth and final volume of The Saga of Pliocene Exile.

Until the arrival of Aiken Drum, the 100,000 humans who had fled backward in time to Pliocene exile on Earth knew little but slavery to the Tanu -- the humanoid aliens who came from another galaxy. But King Aiken's rule is precarious, for the Tanu's twisted bretheren are secretly maneuvering to bring about his downfall. Worse -- Aiken is about to confront a man of incredibly powerful Talents who nearly overthrew a galactic rule. He is Marc Remillard. Call him . . . The Adversary.

Slaughterhous-Five is one of the world's great anti-war books. Centering on the infamous fire-bombing of Dresden, Billy Pilgrim's odyssey through time reflects the mythic journey of our own fractured lives as we search for meaning in what we are afraid to know.

Unstuck in time, Billy Pilgrim, Vonnegut´s shattered survivor of the Dresden bombing, relives his life over and over again under the gaze of aliens; he comes at last to some understanding of the human comedy.

This collection from Grand Master Robert A. Heinlein includes five short stories sure to please science fiction fans everywhere.

All You Zombies -: A young man walks into a bar and meets a time-traveling bartender whose origins - and relation to the young man - are more convoluted and stranger than the snake-swallowing-his-tail ring on the barkeep's finger. This is considered one of the most influential and thought-provoking short stories ever to tackle the mind-bending nature and paradoxes of time travel.
this story can be read online here

The Man Who Traveled in Elephants: In one of both Heinlein and Spider Robinson's all-time favorite stories, we join a former traveling salesman on a bus. The man and his wife had once traveled with a host of imaginary animals searching for places to sell elephants.
this story can be read online here

They: This story takes listeners inside a mental institution, where a man suffering from delusions has been confined.
this story can be read online here

Our Fair City: A parking attendant named Pappy, a sentient whirlwind named Kitten, and a crusading reporter named Pete aim to take down their corrupt city government.
this story can be read online here

- And He Built a Crooked House -: A clever architect designs a house in the shape of the shadow of a tesseract, but it collapses through the fourth dimension when an earthquake shakes it into a more stable form.
this story can be read online here

The title story was adapted into the theatrical film Predestination in 2014.

Exiled beyond the time-portal into the world of six million years ago, the misfits of the 22nd century are enmeshed in the age-old war of two alien races. In this strange world, each year brings the ritual combat between the Firvulag and the Tanu.

The direct sequel to the Hugo Award- winning novel Cyteen, Regenesis continues the story of Ariane Emory PR, the genetic clone of one of the greatest scientists humanity has ever produced, and of her search for the murderer of her progenitor-the original Ariane Emory.

Murder, politics, deception, and genetic and psychological manipulation combine against a backdrop of interstellar human societies at odds to create a mesmerizing and major work in Regenesis. Who did kill the original Ariane Emory? And can her personal replicate avoid the same fate?

Those questions have remained unanswered for two decades-since the publication of Cyteen. Now in Regenesis those questions will finally be answered.

A young woman discovers she has tremendous psychic power.

The baby's name is Mary, and her father is immortal. For thousands of years he has orchestrated a selective breeding project, attempting to create a master race capable of controlling others through thought. Most of his attempts have resulted in volatile mutations, but Mary-whom he has raised in the rough part of a Southern California town-is the closest he has come to perfection. If he doesn't handle her carefully, this greatest experiment will be his last.

As Mary comes of age, she begins to grow aware of her psychic powers. And when she learns of her father's plans for her, she refuses to acquiesce. She challenges him to a psychic war, battling to free her people and set a new course for mankind.

Virginia Woolf's Orlando 'The longest and most charming love letter in literature', playfully constructs the figure of Orlando as the fictional embodiment of Woolf's close friend and lover, Vita Sackville-West. Spanning three centuries, the novel opens as Orlando, a young nobleman in Elizabeth's England, awaits a visit from the Queen and traces his experience with first love as England under James I lies locked in the embrace of the Great Frost. At the midpoint of the novel, Orlando, now an ambassador in Costantinople, awakes to find that he is a woman, and the novel indulges in farce and irony to consider the roles of women in the 18th and 19th centuries. As the novel ends in 1928, a year consonant with full suffrage for women. Orlando, now a wife and mother, stands poised at the brink of a future that holds new hope and promise for women.

The plot concerns a young woman biochemist who discovers that a chemical extracted from an unusual strain of lichen (hence the title) can be used to retard the ageing process enabling people to live to around 200-300 years. Wyndham speculates how society would deal with this prospect.

The two central characters are Diana Brackley and Francis Saxover, two biochemists who run parallel investigations into the properties of a specific species of lichen after Diana notices that a trace of the specimen prevents some milk turning sour.

She and Francis separately manage to extract from the lichen a new drug, dubbed Antigerone, which slows down the body's ageing process. While Francis uses it only on himself and his immediate family (without their knowledge), Diana founds a cosmetic spa, and builds up a clientele of some of the most powerful women in England, giving them low doses of Antigerone, preserving their beauty and youth. When Saxover finds out about the spas, he erroneously assumes that Diana's motive is profit. Diana's aim, however, is actually female empowerment, intending to gain the support of these influential women, believing that if Antigerone became publicly known, it would be reserved only for the men in power.

After a customer suffers an allergic reaction to one of Diana's products, the secret of the drug begins to emerge. Diana tries to cover up the real source of the drug, since the lichen is very rare and difficult to grow, but when it is finally discovered, she fakes her own death, in the hope of inspiring the women of Britain to fight for the rights she tried to secure for them.

Francis realizes that she may not really be dead, and tracks her down to a remote farm, where she has succeeded in growing a small amount of the lichen. Diana plans to rejoin the world under the guise of being her own sister, and continue the work she left off.

First published in 1953, this most celebrated of Sturgeon's works won the International Fantasy Award, as has been touted as "a masterpiece of provocative storytelling" (The Herald Tribune).

A group of remarkable social outcasts band together for survival and discover their combined powers renders them superhuman.

There is a secret passage through time

...and it leads all the way to the end of Eternity. But the journey has a terrible cost. It alters not only the future but the "present" in which we live.

A century after the publication of H. G. Wells' immortal The Time Machine, Stephen Baxter, today's most acclaimed new "hard SF" author, returns to the distant conflict between the Eloi and the Morlocks in a story that is at once an exciting expansion, and a radical departure based on the astonishing new understandings of quantum physics.

Altar the thief, a man of mystery and secret master of a gaudily decadent world.... a gargantuan spaceship designed to span civilisations... a desperate plunge into the heart of the sun... just the basic ingredients of the volcanic recipe that produces Charles L. Harness's shattering masterpiece.

Cameraman Richard Grey's memory has blanked out the few weeks before he was injured in a car bomb explosion. When he is visited by a girl who seems to have been his lover, his attempts to recall the forgotten period produce an odyssey through France and conflicting accounts of what happened. When Susan Kewley speaks to him of that time, he finds himself glimpsing a terrible twilight world - the world of "the glamour".

This multilayered epic of interstellar cabals and dark human passions is a profound exploration of genetics, environment, nurture, society, and the secrets of human intelligence.

In a futuristic world of cybernetics, two young friends become trapped in an endless nightmare of suspicion, surveillance, programmable servants, a centuries-old ruling class, and an enigmatic woman who dominates them all, in a story marked by genius, blackmail, sacrifice, murder, resurrection, the betrayal of innocence, and loyalty stronger than death.

This is the story of Ariane Emory: brilliant, corrupt, a genius in genetics, psychology, rape, and blackmail. She dominates the Council of Nine, as head of the Expansionist Party of the Multiworld Union, and is despot of the territory Reseune, where her laboratories create the one product essential to Cyteen: people. They are the "azi," human workers and soldiers artificially grown, computer trained, and owned by Reseune and hence by Ariane Emory. After one hundred and twenty years of life and fifty years of rule, Emory is murdered. But not for long...

This is the story of the Project: the plan to replicate Ariane Emory. Creatiing a genetic double is routine for Reseune's bio-technology, but nature is not nurture, and clones are still human beings. For the Project to succeed, Emory's followers have to subject the clone to every formative influence of the tyrant's life, keep her innocent of history, protect her from Emory's enemies, and oppress or silence anyone who might, even accidentally, disrupt the program.

This is also the story of Ari: a little girl driven to solve a mystery she can sense, but not define. A child thrown into a storm of global upheaval when her creation is made public, she inherits a stranger’s face and past, enemies and victims. She must wield her predecessor’s power to save herself, even from people she loves. And to survice, she must find out if she’s a puppet crafted by a dead megalomaniac – or the one person who can defuse a socio-genetic time bomb threatening to destroy her planet. For only Ariane Emory can save Cyteen...

Time Enough for Love follows Lazarus Long through a vast and magnificent timescape of centuries and worlds. Heinlein's longest and most ambitious work, it is the story of a man so in love with Life that he refused to stop living it; and so in love with Time that he became his own ancestor.

In the 24th century, the Company preserves works of art and extinct forms of life (for profit of course). It recruits orphans from the past, renders them all but immortal, and trains them to serve the Company, Dr. Zeus. One of these is Mendoza the botanist. She is sent to Elizabethan England to collect samples from the garden of Sir Walter Iden.

But while there, she meets Nicholas Harpole, with whom she falls in love. And that love sounds great bells of change that will echo down the centuries, and through the succeeding novels of The Company.

The slaughter has begun. The mechs -- violent artificial intelligences dedicated to the total destruction of the human race -- have ravaged humanity's planets throughout the galaxy, forcing the survivors to flee to the Esty, a strange space-time continuum constructed by ancient beings near the galaxy's True Center.

In the Esty, the battered human race makes its final stand against the relentless mechs. It soon becomes hideously clear that young warrior Toby Bishop, his father Killeen, and his grandfather have become special targets that the mechs' terrifying design involves their capture, torture, and extinction.

One moment Joseph Schwartz is a happily retired tailor in Chicago, 1949. The next he's a helpless stranger on Earth during the heyday of the first Galactic Empire. Earth, as he soon learns, is a backwater, just a pebble in the sky, despised by all the other 200 million planets of the Empire because its people dare to claim it's the original home of man. And Earth is poor, with great areas of radioactivity ruining much of its soil--so poor that everyone is sentenced to death at the age of sixty. Joseph Schwartz is sixty-two.

This is young Isaac Asimov's first novel, full of wonders and ideas, the book that launched the novels of the Galactic Empire, culminating in the Foundation series. This is Golden Age SF at its finest.

Fledgling, Octavia Butler's first new novel in seven years, is the story of an apparently young, amnesiac girl whose alarmingly unhuman needs and abilities lead her to a startling conclusion: She is in fact a genetically modified, 53-year-old vampire. Forced to discover what she can about her stolen former life, she must at the same time learn who wanted-and still wants-to destroy her and those she cares for and how she can save herself. Fledgling is a captivating novel that tests the limits of "otherness" and questions what it means to be truly human.

Octavia E. Butler is the author of 11 novels, including Kindred, Dawn, and Parable of the Sower. Recipient of a MacArthur Foundation "genius" grant, the Nebula Award, the Hugo Award, and numerous other literary awards, she has been acclaimed for her lean prose, strong protagonists, and social observations that range from the distant past to the far future.

Their hotel was beautifully situated, high on the northern slope of the huge artificial mound known as the paneium that was sacred to the goat-footed god. From here they had a total view of the city: the wide noble boulevards, the soaring obelisks and monuments, the palace of Hadrian just below the hill, the stately and awesome Library, the temple of Poseidon, the teeming marketplace, the royal lodge that Mark Antony had built after his defeat at Actium. And of course the Lighthouse, the wondrous many-windowed Lighthouse, the seventh wonder of the world, that immense pile of marble and limestone rising in majesty at the end of its mile-long causeway. Black smoke from the beacon-fire ar its summit curled lazily into the sky. The city was awakening.

It looked like the past, on Earth. But times had changed...and changed...and changed.

There were ghosts and chimeras and phastasies everywhere about. A burly thick-thighed swordsman appeared on the porch of the temple of Poseidon holding a Gorgon's severed head and waved it in a wide arc, grinning broadly. In the street below the hotel gate, three small pink sphinxes, no bigger than housecats, stretched and yawned and began to prowl the curbside. A larger one, lion-sized, watched warily from an alleyway: their mother, surely. Even at this distance he could hear her loud purring....

The Ugly Little Boy:

A small Neanderthal boy is brought into the future for scientific experimentation. The nurse who takes care of him, starts to see him as something other than a experimental subject.

The [Widget], the [Wadget], and Boff:

Only Robin could really see the Aliens...

The millions of fans of Lazarus Long—probably Heinlein's most beloved character—will flock to this new tale, which continues adventures of the characters of The Cat Who Walked Through Walls. From the author of Stranger in a Strange Land and Time Enough for Love.

When he came back from the dead... he wished he hadn't.

Jaybee Corbell awoke after more than 200 years as a corpsicle -- in someone else's body, and under sentence of instant annihilation if he made a wrong move while they were training him for a one-way mission to the stars.

But Corbell picked his time and made his own move. Once he was outbound, where the Society that ruled Earth could not reach him, he headed his starship toward the galactic core, where the unimaginable energies of the Universe wrenched the fabric of time and space and promised final escape from his captors.

Then he returned to an Earth eons older than the one he'd left... a planet that had had 3,000,000 years to develop perils he had never dreamed of -- perils that became nightmares that he had to escape... somehow!

The 21st century is coming to a close, and the medical industrial complex dominates the world economy. It is a world of synthetic memory drugs, benevolent government surveillance, underground anarchists, and talking canine companions. Power is in the hands of conservative senior citizens who have watched their health and capital investments with equal care, gaining access to the latest advancements in life-extension technology. Meanwhile, the young live on the fringes of society, ekeing out a meagre survival on free, government-issued rations and a black market in stolen technological gadgetry from an earlier, less sophisticated age.

Mia Ziemann is a 94-year-old medical economist who enjoys all the benefits of her position. But a deathbed visit with a long-ago ex-lover and a chance meeting with a young bohemian dress-designer brings Mia to an awful revelation. She has lived her life with such caution that it has been totally bereft of pleasure and adventure. She has one chance to do it all over. But first she must submit herself to a radical--and painful--experimental procedure which promises to make her young again. The procedure is not without risk and her second chance at life will not come without a price. But first she will have to escape her team of medical keepers.

Hitching a ride on a plane to Europe, Mia sets out on a wild intercontinental quest in search of spiritual gratification, erotic revelation, and the thing she missed most of all: the holy fire of the creative experience. She joins a group of outlaw anarchists whose leader may be the man of her dreams... or her undoing. Worst of all, Mia will have to undergo one last radical procedure that could cost her a second life.

In the far-future city of Clarges, you can live forever – if you can make the grade. In Clarges, everyone competes for the ultimate prize: immortality. Gavin Waylock had that prize – the live-forever rank of Amaranth, but lost it when he was accused of murder. Now, after seven years in hiding he begins again the struggle to reach the top. But a strong-willed woman,The Jacynth Martin, is determined to see him fail – and failure means death.

The Spatterlight Press e-book is available under the alternate title Clarges.

Joshua Kampa, the illegitimate son of a mute Spanish whore and a black serviceman, has always dreamed of Africa. But his dreams are of an Africa far in the past and are so vivid and in such hallucinatory detail that he is able to question the understanding of eminent palaeontologists. As a result, Joshua is invited to join a most unusual time travel project and is transported millions of years into the past of his dreams.

In early Pleistocene Africa, living among the prehuman species Homo habilis, experiencing the same hardships and the same intense pleasures, Joshua finds, for the first time in his troubled life, not only contentment but real love - a love that transcends almost everything. Intelligent, thoughtful and deeply moving, No Enemy But Time brilliantly evokes the remote past and, at the same time, presents a powerful and convincing portrayal of a relationship surmounting even the most daunting barriers. It is a challenging and highly original novel exploring the nature and origins of humankind.

The fourteen stories in this mind-blowing collection range from outrageous satire to evocative fantasy, revealing the future with an alarming intensity.

Table of Contents:

• Poem at a Lunar Eclipse - poem by Thomas Hardy
• The Moment of Eclipse - (1969)
• The Day We Embarked for Cythera... - (1970)
• Orgy of the Living and the Dying - (1970)
• Super-Toys Last All Summer Long - (1969)
• The Village Swindler - (1968)
• Down the Up Escalation - (1967)
• That Uncomfortable Pause Between Life and Art... - (1969)
• Confluence - (1967)
• Heresies of the Huge God - (1966)
• The Circulation of the Blood... - (1966)
• ...And the Stagnation of the Heart - (1968)
• The Worm That Flies - (1968)
• Working in the Spaceship Yards - (1969)
• Swastika! - (1970)

Jack Havig, a man born with the ability to move at will through the past and the future of mankind, must save the world from a doomed future of tyranny before his time runs out.

Charlie Johns has been snatched from his home on 61 North 34th Street and delivered to the strange future world of Ledom. Here, violence is a vague and improbable notion. Technology has triumphed over hunger, overpopulation, pollution, even time and space. But there is a change Charlie finds even more shocking: gender is a thing of the past. Venus Plus X is Theodore Sturgeon's brilliant evocation of a civilization for whom tensions between male and female and the human preoccupation with sex no longer exist.

As Charlie Johns explores Ledom and its people, he finds that the human precepts he holds dear are profane in this new world. But has Charlie learned all there is to know about this advanced society? And why are the Ledom so intent on gaining Charlie's approval? Unsettling, compelling, and no less than visionary, here is science fiction at its boldest: a novel whose wisdom and lyricism make it one of the most original and insightful speculations on gender ever produced.

This novel appeared in Ace Doubles D-421 (1960) and #15697 (1972).

Jim Parsons is a talented doctor, skilled at the most advanced medical techniques and dedicated to saving lives. But after a bizarre road accident leaves him hundreds of years in the future, Parsons is horrified to discover an incredibly advanced civilization that zealously embraces death. Now, he is caught between his own instincts and training as a healer and a society where it is illegal to save lives.

But Parsons is not the only one left who believes in prolonging life, and those who share his beliefs have desperate plans for Dr.Parsons' skills, and for the future of their society.

Dr. Futurity is not only a thrilling rendition of a terrifying future but it is also a fantastic examination of the paradoxes of time-travel that could only have come from the mind of Philip K. Dick.

This is the main novel in Leiber's Change War series.

Have you ever worried about your memory, because it doesn't seem to recall exactly the same past from one day to the next? Have you ever thought that the whole universe might be a crazy, mixed-up dream? If you have, then you've had hints of the Change War.

It's been going on for a billion years and it will last another billion or so. Up and down the timeline, the two sides--"Spiders" and "Snakes"--battle endlessly to change the future and the past. Our lives, our memories, are their battleground. And in the midst of the war is the Place, outside space and time, where Greta Forzane and the other Entertainers provide solace and r-&-r for tired time warriors.