England, 1346: For Thomas Blackstone, the choice is easy - dance on the end of a rope for a murder he did not commit, or take up his war bow and join the king's invasion. As he fights his way across northern France, Blackstone learns the brutal lessons of war - from the terror and confusion of his first taste of combat, to the savage realities of siege warfare.

The tale begins in Dark Age Britain, a land where Arthur has been banished and Merlin has disappeared, where a child-king sits unprotected on the throne, where religion vies with magic for the souls of the people. It is to this desperate land that Arthur returns, a man at once utterly human and truly heroic: a man of honor, loyalty, and amazing valor; a man who loves Guinevere more passionately than he should; a man whose life is at once tragic and triumphant.

Tally lives in a world where your 16th birthday brings aesthetic perfection: an operation that erases all your flaws, transforming you from an "Ugly" into a "Pretty". She is on the eve of this important event and cannot wait for her life to change. As well as guaranteeing supermodel looks, life as a Pretty seems to revolve around having a good time. But then she meets Shay, who is also 15 - but with a very different outlook on life.

EarthCore is the company with the technology, the resources, and the guts to go after the mother lode. Young executive Connell Kirkland is the company's driving force, pushing himself and those around him to uncover the massive treasure. But at three miles below the surface, where the rocks are so hot they burn bare skin, something has been waiting for centuries. Waiting...and guarding. Kirkland and EarthCore are about to find out first-hand why this treasure has never been unearthed.

An inexplicable explosion rocks the antiquities collection of a London museum and the race begins to determine how it happened, why it happened, and what it means.

Surrounded by secrecy, it is home to the wildest dreams and darkest nightmares. Incredible amounts of money have been lavished on it. The best minds of two generations have labored to build it. And somehow, bit by bit, it is claiming the Earth's most valuable resource - its children.

Penn Mitchell vanishes from the NYU campus and shows up three months later on his mother's doorstep with a book screaming to get out of his head. When the FBI discovers the novel discloses top-secret information, they bring Penn in for questioning. The interrogation goes sideways and Penn escapes into a subterranean world he thought was a figment of his imagination, a world where the US government is hiding, and at war with, an ancient race that has existed since the dawn of time.

Beyond the sparkling Hawaiian beaches, masked by the deceptive beauty of the rainforest, evil awaits 16-year-old Michael Sundquist and his mother, Katharine, an anthropologist who has come to the Islands to study the unusual skeletal remains unearthed on the volcanic flanks of Haleakala, Maui.

It was supposed to be a 72-hour mission, in and out, until Brandt Stryker got stranded in the arid African plains with predators before him, a killer at his heels, and an exotic princess by his side. Dalilah Al Arif stirs his blood, makes him crave things he'd lost long ago - but she is off-limits, promised to a sheik. Dalilah's wedding contract stipulates she must wed before her 30th birthday - just months away. It's a duty she accepts. But in the arms of her handsome protector, she's torn between her sense of duty and honor, and her freedom.

Tunguska, Roswell, the Bermuda Triangle, the Mary Celeste... For hundreds of years, the danger posed by colliding worlds has been ignored as a crackpot theory, until now, and now it's too late.

It's 1944. As war rages in Europe and the Pacific, army intel makes a shocking discovery: a 300-foot Japanese sub, marooned and empty, deep in the Brazilian interior. A team of army rangers sent to investigate has already gone missing. Now the military sends Captain R. J. MacCready, a quick-witted, brilliant, scientific jack-of-all-trades, to learn why the Japanese are there - and what they're planning.

For 18-year-old Gideon Blake, nothing but death can keep him from achieving his goal of becoming a US Army Ranger. As it turns out, it does. Recovering from the accident that most definitely killed him, Gideon finds himself with strange new powers and a bizarre cuff he can't remove. His death has brought to life his real destiny. He has become War, one of the legendary four horsemen of the apocalypse.

Covert government operative Danielle Laidlaw leads an expedition into the deepest reaches of the Amazon in search of a legendary Mayan city. Assisted by a renowned university professor and protected by a mercenary named Hawker, her team journeys into the tangled rain forest - unaware that they are replacements for a group that vanished weeks before, and that the treasure they are seeking is no mere artifact but a breakthrough discovery that could transform the world.

A chain of subglacial volcanoes erupt in Iceland. The melting ice floods the countryside. Poisonous gas descends on Scotland. A tsunami devastates the Norwegian coastline. An ash cloud rises into the atmosphere, blotting out the sun across Europe, ushering in a new Ice Age. Dozens of nuclear power plants, flooded by ocean water, experience meltdowns. Millions perish. Many more are displaced. All on the first day.

Sixteen all-new stories by science fiction's top talents, collected by best-selling author George R. R. Martin and multiple-award-winning editor Gardner Dozois.