How much sacrifice should anyone have to give? Petal and Gabriel are forced to decide, as the mad, digital entity Elliot Robertson is determined to dominate the world. His influence, spread by an insurgent group, The Ronin, seeks to control and enslave the last of humanity. With time running out, Petal and Gabriel must travel to the far reaches of the abandoned lands in order to repair a server they believe will be the key to defeating Elliot and his Ronin.

We have always fought. War is the furnace that forges new technologies and pushes humanity ever onward. We are the children of a battle that began with fists and sticks, and ended on the brink of atomic Armageddon. Beyond here lies another war, infinite in scope and scale. But who will fight the wars of tomorrow?

Desperate to prove that he has found the unified field theory in the Bible, young mathematics prodigy Jacob Saylor runs away to the Middle East. But when he and his brother venture into the desert they disappear, only to return years later with no memory of where they have been. Then a group of cybernetic terrorists calling themselves The Embodied attack. Having discarded their humanity for bodies of living technology they serve their masters by secretly manipulating world events, eliminating enemies, and toppling nations.

In 2101, having conquered the Solar System, most humans are choosing to tie their minds to an Artificial Intelligence. The only place to be free of AI is living off-world, with Saturn and its vast system of moons serving as the wild frontier. The only caveats to living there: the funds to fly a billion miles into space and a pledge to keep vigil against the threat of AI. Otherwise, what you do out there is your business.

Very soon, when the government is bankrupt and battling civil unrest...a ruthless, global conspiracy will rise from the shadows to seize control of everything. But that’s only the start. They’ll soon unleash a mysterious red rain, grounding all travelers, knocking out communications, and taking down the grid with a massive EMP.

Valko can see the last moments of a victim's life. It comes at a price - a scrap of flesh cut from his brain and replaced with an implant. Bound to a drug that lets him use his insight but brings with it the pain of synthetic emotion, he's at war with himself. Now, a killer has found a way to hide from him, and two people are dead. Someone wants to keep their secrets buried. The trail leads out into the wasteland where death flies on the wind as nanotech dust. Manipulated and betrayed, Valko must get to the truth before his time runs out.

The year is 2025. Astronaut Caitlyn "Sif" Wagner and her team emerge from stasis to discover that their Mars mission has gone terribly awry - the crew has run off course in space and, they suspect, in time as well. Their damaged ship returns to an Earth reduced to overgrown cities and blasted terrain. Yet humans have somehow survived, living in caves, foraging at night, returned to a tribal existence.

From USA Today best-seller Robert Armstrong comes the fast-paced sci-fi series Echo Effect. Get the first two titles from the series in this audiobook: Echo Effect and Symphony of Descension.

To Inquisitor Angel Xia, it was just another corporate killing on a backwater planet. But as the bodies begin to pile up and she finds herself a target, she realizes she's stepped on one toe too many. Barely escaping attempts on her life by powerful agents with seemingly limitless reach and influence, Angel senses even her co-Inquisitors can't be trusted. But as the web tightens, she receives a cryptic message from a computer program claiming to be a little girl in desperate need of her help.

Heir to one of the leading "Four Horsemen" mercenary companies, Jim Cartwright is having a bad year. Having failed his high school VOWS tests, he's just learned his mother bankrupted the family company before disappearing, robbing him of his Cavalier birthright. But the Horsemen of eras past were smart - they left a legacy of equipment Jim can use to complete the next contract and resurrect the company.

Humanity has colonized the planets - interstellar travel is still beyond our reach, but the solar system has become a dense network of colonies. But there are tensions - the mineral-rich outer planets resent their dependence on Earth and Mars and the political and military clout they wield over the Belt and beyond. Now, when Captain Jim Holden's ice miner stumbles across a derelict, abandoned ship, he uncovers a secret that threatens to throw the entire system into war.

All contact is lost with the first human colony on Mars during a long and destructive sandstorm. Satellite imagery of the aftermath shows extensive damage to the facility. The 54 colonists who called it home are presumed dead. Three years later, a new mission sets down on the surface to investigate what remains of the derelict site. But it's not long before they realize the colony is not as lifeless as everyone thought. Someone is still alive - hiding out somewhere. Yet, before they can find the elusive colonist, a strange illness starts to affect the crew.

Kalian Gaines has a secret; he just doesn't know it yet. He looks like us, he lives like us...but he is not one of us. Kalian knows nothing outside of his mundane life teaching history on 30th-century Earth, until a day like any other triggers a series of events that will tie his fate to that of humanity. A human handprint, embedded into a rock with alien script, is discovered on a moon that mankind has never set foot on. This discovery holds a secret, which will sweep Kalian into the heart of a conspiracy that has corrupted the galaxy for 200,000 years.

Jennifer Smythe escapes Earth's invasion by the insidious Kasari race, hijacks an alien starship, and survives the deadly passage through a wormhole. But escape is short-lived.... When Jennifer emerges on the new world of Scion, she is confronted by the same deadly enemy. Now the Kasari have sided with the planet's angel-like elite against the warrior underclass, but with the intent of ultimately ruling both.

Two hundred years ago, a fleet of colony ships left Earth and started a settlement on Proxima Centauri. Centurion Space Force pilot Nathan Stacker didn't expect to return home to find his wife dead. He didn't expect the murderer to look just like him, and he definitely didn't expect to be the one to take the blame. But his wife had control of a powerful secret. A secret that stretches across the light years between two worlds and could lead to the end of both. Now that secret is in Nathan's hands, and he's about to make the most desperate evasive maneuver of his life.