One small handwritten letter, sent from a dark, remote corner of the planet and lost in the system for 60 years, is about to change the entire human race. Outside Denver, Colorado, Joe Rickards stands over a small aircraft wreckage, studying burnt remains still smoldering in a field of freshly fallen snow. He's an investigator for the NTSB, working to carefully roll back the last several hours and identify the cause of the accident. But this time, he can't.

In 2018, Canadian archaeologist Ron Jackson makes a mind-boggling discovery in Antarctica - right before disappearing without a trace, leaving behind only his controversial theory that humans have lived on Earth far, far longer than we think they have. Decades later, in 2042, when Jackson's wife dies under mysterious circumstances, an unlikely pair of investigators, Agatha Devenworth and Pano Hofer, begin investigating whether her death might be connected to Jackson's disappearance.

Nora Kelly, a young archaeologist in Santa Fe, receives a letter written 16 years ago, yet mysteriously mailed only recently. In it her father, long believed dead, hints at a fantastic discovery that will make him famous and rich - the lost city of an ancient civilization that suddenly vanished a thousand years ago. Now Nora is leading an expedition into a harsh, remote corner of Utah's canyon country, but what she unearths will be the newest of horrors.

Former naval doctor Peter Crane is summoned to a remote oil platform in the North Atlantic to help diagnose a bizarre medical condition. But when he arrives, Crane learns that the real trouble lies far below on "Deep Storm", a stunningly advanced science-research facility built two miles beneath the surface on the ocean floor. The top-secret structure has been designed for one purpose: to excavate a recently discovered undersea site that may hold the answers to an ancient mystery.

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.

Dr. Sam Anderson is one of the most celebrated scientists in history. Ten years ago, he invented a device that changed the world forever. Now his life is about to be ripped apart—and his own creation may be to blame. One fateful morning, Sam discovers that his girlfriend has been murdered and that his daughter is accused of the crime. Sam believes she's innocent, but he can't prove it. There's only one thing he can do to save his daughter: confess to the crime. And so he does. But in the future, murderers aren't sent to prison. They're sent to the past.

With the help of a powerful computer system, Alison Shaw and her team are preparing to translate the first two-way conversation with the planet's second smartest species. But the team discovers much more from their dolphins than they ever expected when a secret object is revealed on the ocean floor. One that was never supposed to be found.

When Russ Wesley finds an unusual artifact in his grandfather’s collection of rare antiquities, the last thing he expects is for it to draw the attention of a ferocious alien from a distant planet. Equally surprising is the adventurous team of intergalactic exterminators dispatched to deal with the alien threat. They’re a little wild, and a little reckless. Worse yet, they’re so impressed with Russ’s marksmanship that they insist he join their squad . . . whether he wants to or not.

Noah Harris and Ashley Flynn are field agents for a powerful organization tasked with protecting humanity from the misuse of game-changing technology. But when they discover hidden portals that link Earth to numerous planets, they are thrust into a maze of deception and intrigue they can't begin to understand....one that not only has them battling for their very lives, but that will decide the fate of worlds. Because, inexplicably, each of the planets contain human civilizations, and the rulers of our nearest portal neighbor have come up with a brilliant, twisted plan to conquer ours.

Geophysicist Jack Greer believes he may finally have found the resting place of the meteorite that wiped out the dinosaurs 65 million years ago. A few miles off the Yucatán coast, Jack and a team of scientists tow an aging drilling platform over the impact crater with the aim of securing a sample. But buried deep beneath the earth lies a shocking discovery that threatens to shatter everything we think we know about our species.

On a desolate beach in far northern Scotland, the winter storms have been washing up all manner of things since time began. But buried in the centre of one smaller iceberg is a shard of ancient Viking pottery telling a partial tale of a hidden mysterious island beyond the ice and mist, that was home to a great treasure and even greater horrors. Thawing in the same block of ice was a rotting flap of skin that refused to be identified but had similar skin patterns to a creature not seen for 100 million years.

Three best-selling novels starring marine biologist Sam Reilly by master of action and adventure Christopher Cartwright is presented in this thrilling audio collection. Listen to the exciting adventures in The Last Airship, The Mahogany Ship, and Atlantis Stolen.

After a rough break up, Wyatt moves to New York City, eager to prove himself while working on Wall Street. When he’s asked to visit the father of his ex-girlfriend, a billionaire tycoon, his fate is sealed. The revolutionary company, Nu-En, launches a radical innovation, an energy that will allow every person on the planet access to power. Only it doesn’t perform as anticipated. Harnessing the ocean has consequences, and highly dangerous creatures emerge from the depths. Soon, the Earth is fracturing, and the world will never be the same.

Elliot has just finished his third year of college as a finance major. After some tragic family news, he isn’t sure what the future holds. Working part time at the video rental store, Elliot is dumped and offered a promotion, all on the eve of the island’s biggest celebratory day: The Fourth of July. With the help of his best friend, Bones, the new waitress from the local diner, and a mysterious soldier, Elliot must uncover the secrets that surround Bell Island before it’s too late.

Technology has developed to the point where a person can be placed in a sleep state: a cross between suspended animation and a drug-induced coma. Just as the trial of the new technology is being completed, an unusual comet is discovered approaching Earth, bringing with it radiation that will wipe out all life on the planet.

The remote and impenetrable Pakistani mountains have offered refuge to the worst enemies of civilization since the time of Alexander. Now, the world faces a new challenge. Reared from birth to harbor a seething hatred, a lone man is about to unleash a firestorm that will rage for centuries. And the window of opportunity to stop him is shutting much faster than Washington D.C. can hope to deal with. A top lethal operative, Will Parker is embedded within the terrorist's ranks to stop this catastrophic disaster.

While studying wolverines on a wildlife sanctuary in Montana, biologist Alex Carter is run off the road and threatened by locals determined to force her off the land. Undeterred in her mission to help save this threatened species, Alex tracks wolverines on foot and by cameras positioned in remote regions of the preserve. But when she reviews the photos, she discovers disturbing images of an animal of a different kind: a severely injured man seemingly lost and wandering in the wilds.

Alec works in the Detroit Overseer-factories, building a mysterious alien device. When three strangers appear, he's provided an opportunity to escape after years of servitude. Cole, a Freeborn loner, encounters Lina after her village is destroyed by the alien Occupation. Together, they make the arduous journey to a fabled safe-zone, trying to stay one step ahead of the enemy drones on their trail. Dex is a Hunter, working for the Occupation to track down escaped factory slaves, or Roamers, at all costs. But his latest hunt uncovers a massive secret.

Twenty years ago, a terrified young boy was abducted in the middle of the night by masked intruders while his sister watched, paralyzed with fear. Returned after a harrowing nine months with his captors, Thea's brother has never been the same. This life-shattering experience drove Thea to become what she is today: a world-class freedom broker. Most hostage-recovery work is done at the negotiation table, but when diplomacy fails, Thea leads Quantum Security International's black-ops team on highly sensitive rescue missions.

Archaeologist Fiona Carver has unfinished business in the Aleutian Islands. After an emergency evacuation cut her first expedition short, she’s finally back. But time is not on her side as she races to finish documenting the remnants of a prehistoric village, recover missing artifacts, and track down missing volcanologist Dylan Slater. Having bluffed his way onto Fiona’s team with fake credentials, wildlife photographer Dean Slater is willing to risk more than federal prison to find his missing brother, but he needs Fiona’s help.

Veteran pilot Clark Maxwell thought his fire bombing days were well behind him. But when Jerry Stein, Maxwell's friend and air tanker fleet-owner, calls at the height of the fire season to beg him to reenter the war, he doesn't hesitate. As the wildfires spread, whipped by massive winds and the federal forces arrayed against the fires reach their limits, hysteria and potential evacuation threatens the local population.

Trooper Jack Blake pilots bush planes, mushes dogteams, and climbs on snowshoes to catch the bad guy. With horrible weather, blood-thirsty grizzly bears, politics, and plane crashes, his job to find real justice is hard enough. Then Blake learns that one particularly powerful guy is making it his job to kill him with the unlimited resources of his wealth and power.

Jackson Lee is a well-known adventure vlog influencer. He and a small support crew have been cashing in on the video craze with phenomenal, hair-raising exploits for years. Their latest undertaking is way beyond anything they've ever done. It's extremely dangerous and, worse, highly illegal. Never would Jackson have imagined those risks to be the least of his worries.

In the world of fighter pilots, the most alpha of the alpha, competition is everything and the stakes are impossibly high. A Top Gun for the new millennium, Lions of the Sky propels us into a realm in which friendship, loyalty, and skill are tested, battles won and lost in an instant, and lives irrevocably changed in the time it takes to plug in your afterburners.

The attacks of September 11, 2001, prompted the creation of a robust and deadly special operations force—Task Force Dagger. Alan C. Mack, Callsign Razor 03, led a team of MH-47E helicopters and armed MH-60s. Their two-fold mission–Personnel Recovery (PR) and Unconventional Warfare (UW) involved flying in terrain and weather previously not thought possible. If that wasn’t enough, they pushed the flight envelope of their specially modified Chinooks to the limit and beyond.

Meet Jake Oliver. The day will come when he's one of the best cleaners in the business, a man skilled at making bodies disappear. At the moment, however, he's a 22 year old rookie cop, unaware his life is about to change. In a burning barn a body is found--and the fire isn't the cause of death. The detectives working the case have a pretty good idea about what went down. But Officer Oliver thinks it's something else entirely, and pursues a truth others would prefer remain hidden - others who will go to extreme lengths to keep him quiet.

Cloaked by the mists of dawn, Task Force 61 - carrying tanks, aircraft, and over 5000 Marines - steams toward Syria with deadly intent. Their mission: rescue 100 hostages from a terrorist stronghold - alive. With realism seldom seen in military fiction, The Med is a magnificent and timely epic that brings the human drama of armed conflict compellingly to life.

Navy helicopter pilot Lt. Alison Malone has been assigned to a search and rescue team based at Naval Air Station Fallon, Nevada, near the rugged peaks of the Sierra Nevada, and far from her former elite H-60 squadron. A rule follower by nature, Alison is exasperated and outraged every time she flies with her mission commander, "Boomer" Marks, for whom military procedures are merely a suggestion. Alison is desperate to be transferred out of the boonies, where careers stagnate, and back to her life and fiancé in San Diego.

In the summer of 1947, an unidentified object crashed in Roswell, New Mexico. There were no survivors. Now it's happened again. But this time, two creatures have emerged from the wreckage alive.

In remote, icy Greenland, ex-Air Force General Steven Macaulay helps lead an expedition to recover a lost World War II plane. Encased in ice below is a find that will astonish the world - a perfectly-preserved Viking ship, buried for nearly a thousand years, along with the frozen corpses of nine crewmen. Assembling the foremost Viking scholars, Macaulay tasks the gorgeous Lexy Vaughan to translate the ship’s markings - until her work is cut short when her colleagues are murdered.