The artifact is found seven miles below the surface of the sea and beneath 40 more feet of sand. The Navy's efforts to raise a wrecked submarine uncover it - and set in motion a scientific race to retrieve it, to discover just what it is and where it came from. Denser than any substance known to man, it has broken every drill bit they've tried on it and will not budge an inch. It resists every effort to breach it - or communicate with it.

More even than space travel, the Stileman Process has altered 21st-century life. The most complex of medical miracles, it ensures that every 10 years or so, the ailing aging body can be restored to youthful vigour and health. There's a catch, of course: the cost. Every 10 years or so, you have to come up with £1,000,000 minimum to repeat the procedure or die. For Dallas Barr, one of the oldest men on earth, it's that time again. While casting around desperately for his next essential £1,000,000, he meets Maria, a woman from a previous life, and makes two major discoveries.

The hoax proposed to John Baird by a two-bit con man in a seedy Key West bar was shady but potentially profitable. With little left to lose, the struggling, middle-aged Hemingway scholar agreed to forge a manuscript and pass it off as Papa's lost masterpiece. But Baird never realized his actions would shatter the history of his own Earth - and others. And now the unsuspecting academic is trapped out of time - propelled through a series of grim parallel worlds and pursued by an interdimensional hitman with a literary license to kill.

Young Carmen Dula and her family are about to embark on the adventure of a lifetime - they're going to Mars. Once on the Red Planet, however, Carmen realizes things are not so different from Earth. There are chores to do, lessons to learn, and oppressive authority figures to rebel against.

Friday, a secret courier, is thrown into an assignment under the command of her employer, a man she knows only as "Boss." She operates from and over a near-future Earth in North America, a vulgar and chaotic land comprised of dozens of independent states. In America's disunion, Friday keeps her balance nimbly with quick, expeditious solutions as she conquers one calamity and scrape after another.

This last volume in the definitive collection of the best science fiction novellas published between 1929 and 1964 contains 11 great classics. No anthology better captures the birth of science fiction as a literary field. Published in 1973 to honor stories that had appeared before the institution of the Nebula Awards, The Science Fiction Hall of Fame introduced thousands of young listeners to the wonders of science fiction and was a favorite of libraries across the country.

They first appear as a series of dots on astronomical plates, heading from Saturn directly toward Earth. Since the ringed planet carries no life, scientists deduce the mysterious ship to be a visitor from another star. The world's frantic efforts to signal the aliens go unanswered. The first contact is hostile: the invaders blast a Soviet space station, seize the survivors, and then destroy every dam and installation on Earth with a hail of asteriods.

Best-selling science fiction superstars Larry Niven and Jerry Pournelle combine their talents with those of Steven Barnes in an extraordinary adventure of humankind’s first outpost in the farthest reaches of space. Light years from Earth, colonists land on a planet they name Avalon. It seems like a paradise—until native creatures savagely attack. It will take every bit of intelligence, courage, and military-style discipline to survive.

Aros of Azteca and Neoloth-Pteor are the deadliest of enemies: swordsman and sorcerer, locked in mortal combat, who have tried to kill each other more times than either can count. But when the princess Neoloth loves is kidnapped, there is only one plan that offers any hope of rescue...and that requires passing off the barbarian Aros as a lost princeling and infiltrating the deadliest cabal of necromancers the world has ever seen. They cannot trust each other. They will betray or kill each other the first chance they get. But they're all each other has.

Doctor Toby Glyer has effected miracle cures with the use of nanotechnology. But Glyer’s controversial nanites are more than just the latest technological advance, they are a new form of life - and they have more uses than just medical. Glyer’s nanites also have the potential to make everyone on Earth rich from the wealth of asteroids.

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.

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!

Roger Torraway watched in horror as the monster lurched, toppled over and died. Project Man Plus had gone suddenly and drastically wrong. The race to colonize Mars was too important, too costly, and America was already too committed, for plans to be scrapped. They would have to make a new Martian. And Roger Torraway was it, candidate for the endless surgery, operation after painful operation, that would enable him to survive on that faraway planet.

After being thrown out of the window of his luxury apartment, science-fiction writer Allen Carpentier wakes to find himself at the gates of Hell. Feeling he's landed in a great opportunity for a book, he attempts to follow Dante's road map. Determined to meet Satan himself, Carpentier treks through the nine circles of Hell, led by Benito Mussolini, and encounters countless mental and physical tortures.

The opening chapter of an incredible adventure that includes the destruction of Earth by ten thousand relativistic bombs launched by an alien race. This science fiction thriller follows the desperate struggles of the remnants of humankind to survive in a hostile universe.