The Ghost Brigades are the Special Forces of the Colonial Defense Forces, elite troops created from the DNA of the dead and turned into the perfect soldiers for the CDF's toughest operations. They're young, they're fast and strong, and they're totally without normal human qualms.

The people of Earth now know that the human Colonial Union has kept them ignorant of the dangerous universe around them. For generations the CU had defended humanity against hostile aliens, deliberately keeping Earth an ignorant backwater and a source of military recruits. Now the CU’s secrets are known to all. Other alien races have come on the scene and formed a new alliance - an alliance against the Colonial Union. And they’ve invited the people of Earth to join them. For a shaken and betrayed Earth, the choice isn't obvious or easy.

"I'm Zoe Boutin Perry: A colonist stranded on a deadly pioneer world. Holy icon to a race of aliens. A player in a interstellar chess match to save humanity. Seventeen years old. Everyone on Earth knows the tale I am part of. But you don't know my tale: I'm going to tell it to you now, the only way I know how: not straight but true, the whole thing, to try make you feel what I felt: the joy and terror and uncertainty, panic and wonder, despair and hope."

John Perry did two things on his 75th birthday. First, he visited his wife's grave. Then he joined the army. The good news is that humanity finally made it into interstellar space. The bad news is that planets fit to live on are scarce - and alien races willing to fight us for them are common. So, we fight, to defend Earth and to stake our own claim to planetary real estate. Far from Earth, the war has been going on for decades: brutal, bloody, unyielding.

Humans expanded into space...only to find a universe populated with multiple alien species bent on their destruction. Thus was the Colonial Union formed, to help protect us from a hostile universe. The Colonial Union used the Earth and its excess population for colonists and soldiers. It was a good arrangement...for the Colonial Union. Then the Earth said: no more.

Our universe is ruled by physics, and faster-than-light travel is not possible - until the discovery of The Flow, an extradimensional field we can access at certain points in space-time that transports us to other worlds, around other stars. Humanity flows away from Earth, into space, and in time forgets our home world and creates a new empire, the Interdependency, whose ethos requires that no one human outpost can survive without the others. It's a hedge against interstellar war - and a system of control for the rulers of the empire.

The collapse of The Flow, the interstellar pathway between the planets of the Interdependency, has accelerated. Entire star systems - and billions of people - are becoming cut off from the rest of human civilization. This collapse was foretold through scientific prediction...and yet, even as the evidence is obvious and insurmountable, many still try to rationalize, delay and profit from, these final days of one of the greatest empires humanity has ever known.

For years, the ancient alien AI known as Skippy (the Magnificent, don’t forget that part) has been able to do one impossible thing after another. What is his secret? It’s simple: 100 percent Grade-A extreme awesomeness. And also because he had never been faced with an opponent of equal power. Until now. This time, he might need a little help from a band of filthy monkeys.

Jane Sagan: Soldier. Killer. Lover. Dreamer. In John Scalzi's best-selling Old Man's War series of science-fiction novels, we see this warrior woman as the other characters see her - silent and strong, from the outside. But now The Sagan Diary shows us Sagan from another point of view: her own, as she prepares to leave military life and join her new husband and adopted daughter on a colony world.

When an experiment to study quantum uncertainty goes spectacularly wrong, physics student Bill Rustad and his friends find that they have accidentally created an inter-dimensional portal. They connect to Outland - an alternate Earth with identical geology, but where humans never evolved. The group races to establish control of the portal before the government, the military, or evildoers can take it away. Then everything changes when the Yellowstone supervolcano erupts in an explosion large enough to destroy civilization and kill half the planet.

Hilketa is a frenetic and violent pastime where players attack each other with swords and hammers. The main goal of the game: obtain your opponent's head and carry it through the goalposts. With flesh and bone bodies, a sport like this would be impossible. But all the players are "threeps", robot-like bodies controlled by people with Haden's Syndrome, so anything goes. No one gets hurt, but the brutality is real, and the crowds love it. Until a star athlete drops dead on the playing field.

Not too long from today, a new, highly contagious virus makes its way across the globe. Most who get sick experience nothing worse than flu, fever, and headaches. But for the unlucky one percent - and nearly five million souls in the United States alone - the disease causes "Lock In": Victims fully awake and aware, but unable to move or respond to stimulus. The disease affects young, old, rich, poor, people of every color and creed. The world changes to meet the challenge.

The elite crew of the pirate ship UNS Flying Dutchman had a simple mission: determining whether the Thuranin are sending another starship to Earth. Along the way, they became sidetracked by securing a future for the UNEF troops on the planet Paradise. When asked whether Earth was now safe, their ancient alien AI responded "Not so much"...now they have to deal with the consequences.

Civil war looms in the Bobiverse in this brand-new, epic-length adventure by Audible number one best seller Dennis E. Taylor. More than a hundred years ago, Bender set out for the stars and was never heard from again. There has been no trace of him despite numerous searches by his clone-mates. Now Bob is determined to organize an expedition to learn Bender’s fate - whatever the cost. But nothing is ever simple in the Bobiverse. Bob’s descendants are out to the 24th generation now, and replicative drift has produced individuals who can barely be considered Bobs anymore.

There's a reason We Are Legion was named Audible's Best Science Fiction Book of 2016: Its irresistibly irreverent wit! Bob Johansson has just sold his software company for a small fortune and is looking forward to a life of leisure. The first item on his to-do list: Spending his newfound windfall. On an urge to splurge, he signs up to have his head cryogenically preserved in case of death. Then he gets himself killed crossing the street. Waking up 117 years later, Bob discovers his mind has been uploaded into a sentient space probe with the ability to replicate itself.