Picking up the saga directly where The Ruins of Mars left off, Waking Titan continues the narrative of Harrison Raheem Assad and the Mars Mission as they explore the caves beneath the Martian ruins. Underground in the great statue chamber, Harrison and his team struggle to come to terms with the discovery of two apparently different alien races depicted in stone. However problematic this new revelation may be, it is Braun, the team’s AI, who truly sees just how far the influence of the mysterious race has reached.

Specialist astronaut Evelyn Slater encounters a small, badly damaged, ancient alien artifact on the first ever space junk elimination mission. Where was it from? Who sent it? International governments impose a security clampdown. Evelyn leads a team of handpicked scientists who make amazing discoveries within the alien device. Secrecy becomes impossible to maintain. When the news is finally released, she becomes embroiled in international politics, worldwide xenophobic hatred, and violence.

We were fighting on the wrong side of a war we couldn't win. And that was the good news. The Ruhar hit us on Columbus Day. There we were, innocently drifting along the cosmos on our little blue marble, like the native Americans in 1492. Over the horizon come ships of a technologically advanced, aggressive culture, and BAM! There go the good old days, when humans only got killed by each other. So, Columbus Day. It fits. When the morning sky twinkled again, this time with Kristang starships jumping in to hammer the Ruhar, we thought we were saved.

Prescient and scientifically accurate, Heart of the Comet is known as one of the great hard SF novels of the 1980s. First published in 1986, it tells the story of an ambitious manned mission to visit Halley's Comet, alter its orbit, and mine it for resources. But all too soon, native cells - that might once have brought life to Earth - begin colonizing the colonists. As factions battle over the comet's future - and that of Earth - only love, courage, and ingenuity can avert disaster and spark a new human destiny.

The sudden appearance of a second space elevator in Brazil only deepens the mystery about the aliens who provided it: the Builders. Scavenger crew captain Skyler Luiken and brilliant scientist Dr. Tania Sharma have formed a colony around the new Elevator's base, utilizing mobile towers to protect humans from the Builders' plague. But they are soon under attack from a roving band of plague-immune soldiers. Cut off from the colony, Skyler must wage a one-man war against the new threat as well as murderous subhumans and thugs from Darwin.

The world holds its breath as the colossal asteroid 2011 AG5 hurtles towards the Earth. As humanity is faced with extinction, archaeologist Sarah Morgan is in a race against time to uncover a secret that has been buried for millennia: that an advanced ancestor once populated the Earth. As Sarah travels across the continents in search of the truth, she discovers there are those that will kill to protect this most ancient of secrets....

This is the first book in the long out of print Five Worlds Trilogy by award-winning author Al Sarrantonio. As the 25th century draws to a close, Prime Cornelian, a ruthless usurper of Martian rule, will do anything to control all of human civilization, and the fate of all humankind is in the hands of the exiled King of Earth, Dalin Shar. Find more novels by Al Sarrantonio at Audible.com. Search Crossroad Press to find more titles by Al Sarrantonio and many other science-fiction, fantasy, horror, mystery, western and mainstream authors.

Hugh McDaniel lives in Queens, New York. He's a genius, and he has been struggling to pick one area to focus his life’s work on. His brother and best friend, Travis, is a marine officer. They get along very well, despite their differences. When aliens suddenly invade and destroy their entire culture, they are forced to struggle together in the ruins. At first they just tried to survive; to collect food, medicine, weapons, and to find other survivors. But now, they've set their sights higher: on resistance and reclaiming their planet from invaders.

What will you do when the world ends? That's a question that needs answering quickly when the gates to Hell open up all over Earth. Taking place across the globe is an apocalypse like no other, and humanity will find itself at war against a smart and merciless foe. Follow the struggles to survive with several characters as things go from bad to worse. Humanity is dwindling.

In the future as Bova here imagines it, Earth is an ecological nightmare, and humanity may well go the way of the dinosaurs. But overhead orbits salvation. A vast metallic island in space, the Trikon station conducts genetic research too risky to be done on earth - research that could save the planet.

The Chrysallaman Empire made contact in 1947. Their mission was simple: find a suitable planet for colonization. Rich with land, minerals and water, Earth - HG-281- could boast only of a primitive race of defenders known as Humans, bugs who could be easily squashed by the might of a single Chrysallaman's mind. When a Chrysallaman ship is unexpectedly brought down in Roswell, New Mexico, the aliens return to their home planet to regroup, leaving behind a broken ship and a young alien boy.

Here are tales of star-faring adventure, peril, and drama. Here are journeys into the mind-bending landscapes of virtual worlds and alternate realities. Here you'll also find stories of humanity's astounding future on Earth, on Mars, and in the solar system beyond - stories that always get the science right. And Bova's gathering of deeply realized, totally human characters are the heroic, brave, tricky, sometimes dastardly engineers, astronauts, corporate magnates, politicians, and scientists who will make these futures possible.

Earth has been destroyed, the entire solar system turned to dust by a cataclysmic event known as the Fracture. Now, the last survivors of humanity live on vast arkships drifting through the Cluster, doing what they can to survive in a hostile ever-changing environment. When the arkship Obsidian is attacked, Wynn awakes in an escape pod fleeing from a huge space battle, unable to remember who he is. Hunted by a killer robot, the forces of a rival arkship, and the Church of the Infinite, Wynn must survive long enough to unlock his lost memories, discover who is behind the attack and take his revenge.

What lies on the dark side of the moon could change the course of humanity forever. When a Chinese rover discovers an alien technology on the dark side of the moon, it is up to Richard "Rock" Crandon and his NASA team of scientists and engineers to devise a way to return before the Chinese and Russians. Forced to deal with bureaucratic oversight and a complex team of personalities, Rock Crandon pushes his team to their limits.

Lauren didn’t ask to be a hero. But one night during the graveyard shift at Jodrell Bank, she captured an astonishing fast radio burst from an alien race. And just like that, the fate of the world was thrust into her hands. Now she’s put everything on the line to blow open the conspiracy of silence surrounding UFOs. She's on the run from MI5 and a secret organization determined to stop her. After a year of dead ends and a heart-breaking personal tragedy, she’s on the verge of being forced to abandon her personal crusade.