Our adventurers have escaped a conflagration only to find themselves in a great underground city. They quickly discover they are not alone. And when a natural disaster threatens to engulf them, it becomes a battle for survival. Can they find the route home to the sun before it is closed to them forever?

There’s a doorway on Mars that has mankind’s greatest minds perplexed. Deep beneath Aeolis Mons an ancient secret is revealed, and a team of explorers led by Forest Judge, Deputy Commander of Gale Base Alpha, are dispatched to investigate. The prehistoric gateway reveals a biosphere preserving Earth’s distant past, and as Judge and crew stand on the threshold of mankind’s greatest discovery the Martian ground trembles. A roar thunders from within, the doorway closes, and the team is trapped.

Jedidiah Huckleberry Smith spent his entire life searching for the raider who mutilated him as a child. Finally, giving up on a trail long grown cold, he leaves his outlaw past behind and starts over in a remote town in Wyoming. Now, teaming up with a beautiful but naïve paleontologist, they stand between his adopted town and its destruction by an army of barbaric prehistoric apes and dinosaurs. But Jed’s past has come back to haunt him. The man he searched for is discovered in a position of power, and Jed must choose...

Lawless, British Columbia is on edge after a powerful earthquake jolts the region, quickly followed by a string of savage animal attacks. Newly stationed to the area after her predecessor mysteriously disappears, Conservation Officer Christine Moon needs to calm the jangled nerves of the small mountain town. Awakened from ancient slumber, something stalks the swirling, grey mists that surround Lawless. A beast with a gnawing hunger that grows stronger by the minute - its only thought, to satisfy its ravenous appetite.

Down there, beyond the deepest caves, below the crust and the mantle, there is another world. An old woman locked away in a Russian asylum has a secret - knowledge of a 500-year-old manuscript written by a long-dead alchemist that will show a passage to the mythical centre of the Earth. She knows it’s real because 50 years ago, she and a team travelled there. And only she made it back. Today, caving specialist Mike Monroe leads a crew into the world’s deepest cave in the former Soviet Union. 

After dying and being reborn into a world that's built like a video game, Jim has found himself stuck in a very old-world style new-player zone for low-level adventurers. Unfortunately, the zone fell out of use centuries ago, and no one told the monsters they were supposed to take it easy on the Noobs. Even worse, the only new player around is Jim. Jim has been given an opportunity, and he'll do his best to take advantage of it.

It begins in Africa. A United Nations relief team in a small village in the Congo makes an alarming discovery. An unknown force is leveling the evolutionary playing field. Men, women, and children have been reduced to a dull catatonic state. The environment surrounding them—plants and animals—has grown more cunning and predatory, evolving at an exponential pace. The insidious phenomenon is spreading from a cursed site in the jungle—known to locals as the Kingdom of Bones—and sweeping across Africa, threatening the rest of the world.

Miah Gray is a 27-year-old former army soldier living in rural New Hampshire with his sister, mother, and her boyfriend. He is plagued by PTSD, finding solace, but not redemption, with the aid of prescribed cannabis. All he wants to do is get high, relax with a good sandwich, and watch a meteor shower with his neighborhood crush, Jen. When the sun's light is blotted out the following morning and the world is plunged into darkness, Miah finds himself locked down with his family, covering windows with trash bags, lighting candles, and following the arcane rules of an ancient prophecy.

A series of bizarre occurrences suddenly plague the island of Cielo Nublado. A dead whale washes ashore riddled with enormous bite marks. A fishing charter is reported missing, jet skiers vanish, and a yacht is found mysteriously ravaged after some kind of enormous impact. Chief of Police Nico Medrano tries to investigate the matter. His search for answers puts him on a collision course with an 80-foot predator, long thought extinct. Violent and merciless, it has risen to the surface, and seeks to wreak havoc on the small island community.

Recon Marine Conor McCall didn’t expect action during his training op in the icy waters off Norway. But when a bizarre summer fog engulfs his boat, he and his team find themselves in a fight against strange, cruel monsters from the depths of the North Sea. When even their allies are enemies, the Recon Marines must do what they have always done: adapt or die. But with a world of ice and monsters seeking to destroy them, every second is mission-critical.  

From executive producers of The Walking Dead and Travis Beacham, the writer of Pacific Rim, comes a heart-stopping Audible Original featuring a brilliant British cast. It’s the near future and seven years since a comet hit the earth and blotted out the sun. The world is a dark, frozen landscape. And then, beastly creatures emerge and take over. A story of apocalypse, horror, and adventure, Impact Winter is a wholly original new saga created just for Audible with immersive 3D audio that dares you to pop in your earbuds and listen in the dark.

In Michigan’s Upper Peninsula, Kira Brine hires a group of friends to help restore her private cottage. The fun little endeavor quickly turns tense as they hear strange noises in the woods. Branches snap and leaves rustle in the distance. Animals seem uncharacteristically frightened and then mysteriously disappear as the hours go on.

When the Air National Guard receives an emergency call for help from a remote Arctic research station in Greenland, Senior Master Sergeant Dan Cameron is chosen to lead the rescue mission. In an attempt to combat climate change, the scientists have genetically engineered an aquatic biofilm capable of generating oxygen and lowering the temperature of the underlying seawater, producing environmental conditions that awaken an organism that has lain dormant beneath the ocean floor for millions of years.

Scientists Dr. Eccleston and Dr. Lerner have done many routine expeditions for the Skurzon Corporation in the past, helping the company search the ocean for newly available resources freed by melting ice. They're expecting to maybe find oil at the bottom of the Arctic Sea. What they aren't expecting is a lost island that defies all scientific understanding.

Ataegina was an isolated world of medieval castles, varied cultures, and conquests, vibrant until the demons rose and spread relentless destruction. Swarms of lethal creatures with black husks, murderous claws, barbed tails, and dreaded “tooth-tongues” raged through the lowlands, killing 90 percent of the planet’s population. Terrified survivors fled to hidden mountain keeps where they eke out a meager existence. When a trio of young warriors discovers a new weapon, they see a chance to end this curse. To save humanity, they must fight.