Space Science

For four centuries, the Order of the King’s Cross has worked in the shadows to protect Promethean society. Known only to the King and his closest advisors, the agents of the Order carry out their monarch’s will throughout the Federated Planets and their neighboring star nations, cleaning up messes, investigating heinous crimes, and most often, eliminating threats. Heather Kilgore is one of the deadliest agents the Order has ever trained. Young, focused, and coldly efficient, the King sends her in when all else has failed.

For decades, the spacefaring species of known space have battled over the largest artifact - and grandest prize - in the galaxy: the all-but-limitless resources and technology of the Ringworld. Now, without warning, the Ringworld has vanished, leaving behind three rival war fleets. If the fallen civilization of the Ringworld can no longer be despoiled of its secrets, the puppeteers will be forced to surrender theirs - everyone knows that they are cowards. But the crises converging upon the trillion puppeteers of the Fleet of Worlds go far beyond even the onrushing armadas.

In a jungle of monsters, the real danger is falling for one... Cora A monster is chasing me through my home. On prehistoric planet Xren, where alien dinosaurs roam free, perhaps I shouldn’t be surprised. My home in a treetop was supposed to be safe. Nobody should know I’m here, a hundred feet off the ground. But this thing even knows my name. I think this is a caveman chasing me. He’s huge and terrifying, with spikes on his face and a big horn growing from his head. He has something even bigger under his loincloth. Yeah, I know their game on this woman-less planet: abduct Earth girls ...

Owen Deathstalker has a prophecy to fulfill. Just as the espers foretold, Owen tumbled an empire and witnessed the end of everything he believed in. All that's left to do is die. But Owen has a few more scores he'd like to settle before his borrowed time is up.The empire is besieged by nanotechnology plagues and AI invasions, while mysterious and horrific beings, known as "the Recreated", descend from the Darkvoid. But right now, Owen's only concern is rescuing Hazel d'Ark from the vicious Blood Runners who abducted her.

A new ally providing aid... An old ally joining the fight... Their resources growing with each passing day... Their homeworld finally on the road to recovery... Things finally seem to be coming together for Captain Scott and the Alliance as he takes his forces on the offensive. However, the Jung may in turn give him more trouble than he bargained for.

Fate had made Owen Deathstalker a rebel hero in an empire choked by tyranny. Embracing his warrior lineage for the sake of freedom, he stoked the flames of revolution, gathering the forces that one day must strike against Imperial authority. That day has come. With his valiant compatriots Hazel d'Ark and Jack Random, Owen must now bring the uprising to a fiery conclusion.

When asubatomic physics experiment causes a massive explosion, interdimensional gateways open in Florida - and aliens pour out. Some intend to bring Earth to its knees. Others seem willing to help, but will annihilate the planet if Navy SEAL Command Master Chief Robert Miller can't stop the menace from spreading.

Alan Saul is now part-human and part-machine, and our solar system isn't big enough to hold him. He craves the stars, but can't leave yet. His sister Var is trapped on Mars, on the wrong side of a rebellion, and Saul's human side won't let her die. He must leave Argus Station to stage a dangerous rescue - but mutiny is brewing onboard, as Saul's robots make his crew feel increasingly redundant. Serene Galahad will do anything to prevent Saul's escape. Earth’s ruthless dictator hides her crimes from a cowed populace as she readies new warships for pursuit.

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.

The first of the acclaimed Vatta's War books, the exciting military science fiction series that features a swashbuckling spaceship-captain heroine who mixes commerce with combat.

Spearpoint, the last human city, is an atmosphere-piercing spire of vast size. Clinging to its skin are the zones, a series of semi-autonomous city-states, each of which enjoys a different---and rigidly enforced---level of technology. Following an infiltration mission that went tragically wrong, Quillon has been living incognito, working as a pathologist in the district morgue.

With the continuing failure of the Oversoul, the artificially intelligent guardian computer of the planet Harmony, the human colonists have begun to repeat the devastations of war and conquest wrought on Earth. To repair itself and avert disaster, the Oversoul has called a group of 16 refugees from the fallen city of Basilica to a hidden, abandoned spaceport where the ancient starships lie.

So you’ve fallen in love with space and now you want to see it for yourself, huh? You want to witness the birth of a star, or visit the black hole at the center of our galaxy? You want to know if there are aliens out there, or how to travel through a wormhole? You want the wonders of the universe revealed before your very eyes? Well stop, because all that will probably kill you.

A Rain of Fire: The dark forces of the Neo Hegemony strike, sweeping across the worlds of the Arcadian sector and crushing all in their path. One system stands against the onslaught: the Kingdom of New Avalon. But the men and women of their expeditionary forces are trapped behind enemy lines on a besieged planet. This box set also features Titan's Vengeance and A Relentless Fury.

Authors Christopher Knight and Alan Butler realized that the ancient system of geometry they presented in their earlier breakthrough study works as perfectly for the Moon as it does the Earth. On further investigation, they found a consistent sequence of beautiful integer numbers when looking at every major aspect of the Moon - no such pattern emerges for any other planet or moon in the solar system. In addition, Knight and Butler discovered that the Moon possesses few or no heavy metals and has no core - something that should not be possible.

Autistic scientist Yasira Shien has developed a radical new energy drive that could change the future of humanity. But when she activates it, reality warps, destroying the space station and everyone aboard. The AI gods who rule the galaxy declare her work heretical, and Yasira is abducted by their agents. Instead of simply executing her, they offer mercy - if she'll help them hunt down a bigger target: her own mysterious, vanished mentor. With her homeworld's fate in the balance, Yasira must choose who to trust: the gods and their ruthless post-human angels, or a rebel scientist....

Earth Government turned soldiers into cyborgs to terraform Mars. After a decade of hard, lonely work they are little more than the machines as which they are treated—until the arrival of female settlers awakens feelings they have almost forgotten....

The Solaran Defense Forces make the difficult decision to evacuate the colony of Robichar in order to avoid a direct confrontation. But when Captain Elya Nevers gets shot down during the evacuation, his squadron and the admiral in charge have to think fast to rescue their pilot before the Kryl overrun the system.

Three hundred years from now, Earth has been rendered uninhabitable due to the technological catastrophe known as the Nanocaust. Archaeologist Verity Auger specializes in the exploration of its surviving landscape. Now, her expertise is required for a far greater purpose. Something astonishing has been discovered at the far end of a wormhole: mid-twentieth-century Earth, preserved like a fly in amber.

Late in the 21st century, Earth receives what looks like an urgent plea for help from planet Proxima Centauri b in the closest star system to the Sun. Astrophysicists suspect a massive solar flare is about to destroy this heretofore-unknown civilization. Earth's space programs are unequipped to help, but an unscrupulous Russian billionaire launches a secret and highly-specialized spaceship to Proxima b, over four light-years away.