The first mission to Europa – Jupiter's enigmatic moon – has landed, and humanity’s darkest fears are about to awaken. For years, mankind has speculated that this frozen world harbours a hidden ocean twice the size of all Earth’s oceans combined – an ocean potentially teeming with life. Driven by this tantalising mystery, they venture forth to unlock its secrets. But what they discover in the abyssal depths is far beyond anything they could have imagined.

After years of hard work, Tyler built his IT Security company into a massive success. He trusted his people and now it was time to enjoy the fruits of that labor. Everything was perfect until an unexpected discovery. Should they go through the Maya portal? Adriana's small diving instruction shop is popular enough with the tourists for her to scrape out a living, but it's not the life she expected. When she got the call, it seemed impossible. Wasn't Xibalbá a myth? In a fantastic world of danger and possibility, two people want to discover the truth, but for entirely different reasons.

Indiana Jones meets The X-Files in this thrilling, globe-spanning adventure about the greatest treasure hunt of all time—where ancient secrets collide with cutting-edge technology. In the high-stakes world of ancient artifacts and clandestine organizations, a trio of unlikely misfits are drafted into a desperate race to prevent the assembly of a long lost device.

Caesar, an undercover operative, enters Carmichael with the briefest of orders from his boss and a countdown on his phone. What will happen when the clock strikes zero? Deputy Amelia Miller is dispatched from a nearby city, and a series of events keeps her around much longer than she'd expected. In the middle of the night, something shifts, and the whole town disappears off the face of the Earth. Who caused the shift, and what lies beyond the veil of their settlement?

Two humans and a robot on their own in the Alpha Centauri system: Marchenko, Adam and Eve have found asylum on a planet inhabited by aliens. They could spend the rest of their lives here in peace. But apparently there are many more people who, like them, have been sent to alien systems without a return ticket and without being asked - castaways with uncertain fates who need their help. Their alien rescuers generously offer to take them on a search in one of their spaceships.

In the New Mexico badlands, the skeleton of a woman is found—and the case is assigned to FBI Agent Corrie Swanson. The victim walked into the desert, shedding clothes as she went, and died in agony of heatstroke and thirst. Two rare artifacts are found clutched in her bony hands—lightning stones used by the ancient Chaco people to summon the gods. Is it suicide or… sacrifice?

The day that changed Melody's life was like any other over the previous two years. She'd found she had a gift for writing, and her career as an author had almost healed the pain of losing her job. When the Secret Service rang her bell, everything changed. Something was nearing Saturn…and it was slowing down. Had she been right about the object?

Get ready to experience two more origin stories in the Backyard Starship universe.

In the depths of an ancient Egyptian tomb, archaeologists make a baffling discovery: the mummified body of a man clad in a space suit. Halfway around the globe, exobiologist Dr. Katherine Shepard and intelligence officer Colonel Devon Peters are summoned to the site of a downed UFO. To their amazement, they find one of the occupants alive. Even more shocking, he appears to be human. As Shepard and Peters delve deeper into the enigma, they expose a chilling truth: aliens have inhabited Earth far longer than anyone could have imagined, and they are not alone.

In the darkest part of the solar system lies a wormhole. Nether. Astrophysicist Cammie Skoura has joined the first research team traveling to the Nether anomaly, eager to understand the mechanics of the wormhole and to explore its possibilities as a shortcut to Alpha Centauri. But another race of ancient beings has already been here—an impossibly long time ago—leaving remnants of their vast complexes and gigantic temples built for horrific beings beyond comprehension.

Mitch's mediocre life has just taken a turn for the worse, so his buddy tries to cheer him up by showing him a secret starship. Unfortunately, everything goes south when hostile aliens arrive. In an effort to save his buddy and the starship from the aliens, Mitch does the obvious thing: he accidentally warps hundreds of light-years away. Marooned in a distant star cluster, Mitch is forced to deal with a snarky teenage AI, a rogue auto-pilot, and a beautiful alien soldier who's ready to steal his ship at any moment—so she can fight an oppressive military faction, of course.

In the 1800s, a sailing ship crashes off the coast of Norway. In the 1900s, a Zepellin explores an icy canyon in Antarctica. In the far future, a spaceship sets out for an alien artifact. Each excursion goes horribly wrong. And on every journey, Dr. Silas Coade is the physician, but only Silas seems to realize that these events keep repeating themselves. And it's up to him to figure out why and how. And how to stop it all from happening again.

On a planet shrouded in darkness, a stranded crew must fight for survival. But, the darkness may have plans of its own in this wildly original story from Adrian Tchaikovsky, Hugo and Arthur C. Clarke Award–winning author of Children of Time.

Carpenter Lowell is a disgraced Marine assigned to a remote US research station on Saturn's moon Enceladus, where scientists have made an extraordinary discovery in the ocean below. A special forces team, led by Lowell’s murderous former commanding officer, shows up to investigate. Almost immediately, everything begins to unravel. Something beneath the surface has been activated.

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.

When NASA's Sentinel I satellite detects an impossible reflection and a mysterious signal from Shackleton Crater, the world is thrown into chaos. The discovery points to one chilling truth: an alien artifact lies hidden beneath the lunar surface—and it wants to be found. As China scrambles to exploit the revelation, a new moon race ignites, pushing humanity to the brink.

The first mission to Europa – Jupiter's enigmatic moon – has landed, and humanity’s darkest fears are about to awaken. For years, mankind has speculated that this frozen world harbours a hidden ocean twice the size of all Earth’s oceans combined – an ocean potentially teeming with life. Driven by this tantalising mystery, they venture forth to unlock its secrets. But what they discover in the abyssal depths is far beyond anything they could have imagined.

With humanity facing imminent extinction, Centauri Project scientists use technology originally designed for interstellar travel to send a test subject ten millennia into Earth's future. Marooned in an uninhabited wilderness, microbiologist Nicholas Hindman searches for evidence of remnant populations. He has a protocol to follow and is determined to do so to the bitter end—though he knows he's probably searching in vain, stranded on an uninhabited planet silently orbiting the sun.

When the solar flare took out the world's power… nobody could explain why the street lights still glowed in Jakarta. Was it a signal from space? When the Mars Reconnaissance Orbiter (MRO) transmits strange images of the red planet: a scientifically unexplained light phenomenon on the summit of Elysium Mons has the experts both concerned and baffled. A team needed to check it out. The mission to Mars was set. Now, they had to build the team.

Deep in space lies the black hole known as Angelmass, so called because it emits enigmatic particles with the unusual ability to render humans calm, reasonable, and incapable of lying—which would normally be seen as a good thing. But not by everyone. Academic Jereko Kosta is pressed into service by the Pax to spy on the Empyrean, joining the crew of a ship actively hunting the particles. But what he learns turns out to be both scientifically fascinating and morally frightening.

When a wormhole failure sends geneticist Dr. Osric Rhendall one billion years into Earth’s past, he becomes the sole survivor of humanity’s most ambitious spacefaring mission. Trapped aboard the terraforming ship Daedalus One with a stubborn AI, Osric faces an impossible question: what to do when you’re the only soul in the solar system? Driven by a desire to give meaning to his isolation, Osric begins to remake Earth from scratch. One ecosystem at a time. One species at a time. From engineered algae to bioluminescent canines.

On a planet shrouded in darkness, a stranded crew must fight for survival. But, the darkness may have plans of its own in this wildly original story from Adrian Tchaikovsky, Hugo and Arthur C. Clarke Award–winning author of Children of Time.

When Simon and Katherine Hawke stumble upon an alien shuttle that has landed on Earth, it will not only change the course of their lives but also the entire world. Taking the shuttle into orbit, they discover a much larger ship left adrift with no one on board. Commandeering it, they confirm that we're not alone in the universe and must prepare the human race for what is about to come.

A dead man's quest is never over. Zane Lucas inherits more than his wildest dreams from a man he's never met. The same week, a mysterious cluster of drones appears before him during a random border patrol. Who sent them in the first place? Earth's alliance with the Gral is on the brink of collapse. The forty-three colonies are under duress, and an unknown entity is coming for them.

No one has ever ventured deeper into space than the four astronauts of Shepherd-1. The aim of their mission is to witness the creation of the cosmos. Using the sun as a lens, they are to align a flock of probes in such a way that the moment of the Big Bang becomes visible. For astronomer Christine, this is a dream come true. So she is bitterly disappointed when the first images are obscured by a kind of veil that prevents any insight. She works obsessively to find a solution, but when she finally succeeds in lifting the veil, she sees something that would have been better kept hidden...

The Union is gone. Interstellar travel is no longer safe. Enter ex-Union Navy Officer Cliff Rawlins. More than four years after being wrongfully stripped of his rank and decorations in a court-martial stacked against him, ex-Union Navy Officer Cliff Rawlins suddenly finds himself a free man. The galaxy to which he returns, however, is changing. The Union of Free Planets is on the verge of dissolving. Many of the shadowy political players working behind the scenes to end the Union are the same people who sent Cliff away. Yet, in the coming political upheaval, Cliff glimpses an opportunity.

What happens to the regular people during an alien invasion? What about after humanity gets it's butt kicked? If you, like me, aren't a super soldier, trained assassin, billionaire playboy philanthropist, god or hulk, then you start working for your new alien overlords. And no, you don't get some cool "fly a spaceship around" job- you get to be a farmer!

In a future plagued with natural disasters, criminals known as “scavs” raid damaged cities. Their most important rule: don’t help the survivors. Bear, a twenty-nine-year-old engineer, breaks that rule when he takes Salix, a Native American college student, back to his scav team’s flying ship for medical treatment. Captain Baxter allows her to board but will not let her leave. Salix hopes to escape, but Baxter’s growing obsession with her makes that impossible. As the situation grows tense, a tsunami in Portugal prompts a scav raid.

Could the Founding Fathers have created a better, more enduring republic? What would you say to them if you could go back in time? What warnings would you give? For Harry Brown, a young and passionate libertarian with a deep love for economics and history, these questions are more than academic—they are an obsession. Harry often debates with friends about how the framers might have better safeguarded the Constitution against those who seek to concentrate federal power for their own ends.

Chronicler Tsai Yini monitors the tachyon communication system, which transmits data faster than the speed of light. When classified results from an astrobiologist's research are leaked to her, she cannot believe what she reads. The report reveals that intelligent life forms exist on a tropical planet in the Gliese system. Their civilization is still in its infancy but revolves around an artifact of unknown origin that seems to influence their body chemistry.