A world with no hunger, no disease, no war, no misery: Humanity has conquered all those things and has even conquered death. Now Scythes are the only ones who can end life - and they are commanded to do so in order to keep the size of the population under control. Citra and Rowan are chosen to apprentice to a scythe - a role that neither wants. These teens must master the "art" of taking life, knowing that the consequence of failure could mean losing their own.

Tom Hazard has a dangerous secret. He may look like an ordinary 41-year-old, but owing to a rare condition, he's been alive for centuries. Tom has lived history - performing with Shakespeare, exploring the high seas with Captain Cook, and sharing cocktails with Fitzgerald. Now, he just wants an ordinary life. So Tom moves back his to London, his old home, to become a high school history teacher - the perfect job for someone who has witnessed the city's history first hand. Better yet, a captivating French teacher at his school seems fascinated by him.

In the Society, Officials decide. Who you love. Where you work. When you die. Cassia has always trusted the Society’s choices. And when her best friend appears on the Matching screen, she is certain he’s the one - until she sees another face flash for an instant before the screen fades to black. Now she is faced with impossible choices: Between Xander and Ky, between the only life she’s ever known and a path no has dared to follow...between perfection and the truth.

A visionary work that combines speculative fiction with deep philosophical inquiry, The Sparrow tells the story of a charismatic Jesuit priest and linguist, Emilio Sandoz, who leads a scientific mission entrusted with a profound task: To make first contact with intelligent extraterrestrial life. The mission begins in faith, hope, and beauty, but a series of small misunderstandings brings it to a catastrophic end.

Early 1900s London: Taken from his homeland, twelve-year-old Celestine spends most of the time locked away in the attic of a large house by the sea. The only time Celestine isn’t bound by confines of the small space is when he is acting as an unpaid servant to English explorer Sir Richard Babbington, As the years pass, he desperately clings on to memories of his family in Africa, even as he struggles to remember his mother’s face, and sometimes his real name . . .

When Nigel Walden is 14, the Unhappenings begin. His first girlfriend disappears the day after their first kiss with no indication she ever existed. This retroactive change is the first of many only he seems to notice. Several years later, when Nigel is visited by two people from his future, he hopes they can explain why the past keeps rewriting itself around him.

At his death in 1988, Robert A. Heinlein left a legacy that almost single-handedly defined modern science fiction. But one of Heinlein's masterpieces was never finished. In 1955, he began work on Variable Star, a powerful and passionate tale of two young lovers driven apart by pride, power, and the vastness of interstellar time and space. Now, the Heinlein estate has authorized award-winning author Spider Robinson to expand his outline into a full-length novel. And the result is vintage Heinlein.

Created as an experiment by the time-traveling goddess Pallas Athene, the Just City is a planned community populated by over 10,000 children and a few hundred adult teachers from all eras of history, along with some handy robots from the far human future - all set down together on a Mediterranean island in the distant past.

Rosalinda Fitzroy has been asleep for 62 years when she is woken by a kiss. Locked away in the chemically induced slumber of a stasis tube in a forgotten subbasement, 16-year-old Rose slept straight through the Dark Times that killed millions and utterly changed the world she knew. Now her parents and her first love are long dead, and Rose -  hailed upon her awakening as the long-lost heir to an interplanetary empire - is thrust alone into a future in which she is viewed as either a freak or a threat. Rose must face the ghosts of her past with open eyes....

What if life as we know it was just a game? What if instead of traditional schools, children learned by participating in a virtual reality simulation, one that allowed them to experience "life" from birth to death - multiple times? What if one player, on his final play, could change the world forever?

When prospector Bob Broadhead went out to Gateway on the Heechee spacecraft, he decided he would know which was the right mission to make him his fortune. Three missions later, now famous and permanently rich, Robinette Broadhead has to face what happened to him and what he is...in a journey into himself as perilous and even more horrifying than the nightmare trip through the interstellar void that he drove himself to take!

The first interstellar ship, John Glenn, fled a solar system populated by rogue AIs and machine/human hybrids, threatened by too much nanotechnology, and rife with political dangers. The John Glenn’s crew intended to terraform the nearly pristine planet Ymir in hopes of creating a utopian society that will limit intelligent technology, but by some miscalculation they have landed in the wrong system.

Byron Shaw can track and find anyone on Earth. Except the people who tried to kill him. By 2081, privacy no longer exists. The Lattice enables anyone to re-live any moment of your life. People can experience past and present events - or see into the mind of anyone, living or dead. Most people love it. Some want to destroy it. Colonel Byron Shaw has just saved the Lattice from the most dangerous attack in its history. Now he must find those responsible.

On the Ark, a colonyship bound outward across the stars, not everyone is a volunteer - or even human. Lovelock is a capuchin monkey engineered from conception to be the perfect servant: intelligent, agile, and devoted to his owner. He is a "witness", privileged to spend his days and nights recording the life of one of Earth’s most brilliant scientists via digital devices implanted behind his eyes. But Lovelock is something special among witnesses. He’s a little smarter than most humans: smart enough to break through some of his conditioning, smart enough to feel the bonds of slavery - and want freedom.

The best science fiction scrutinizes our culture and politics, examines the limits of the human condition, and zooms across galaxies at faster-than-light speeds, moving from the very near future to the far-flung worlds of tomorrow in the space of a single sentence. Neil Clarke has selected the short science fiction (and only science fiction) best representing the previous year's writing, showcasing the talent, variety, and awesome "sensawunda" that the genre has to offer.