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.

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.

Not content with investing his fortune and watching it grow, multibillionaire Howard Christian buys rare cars that he actually drives, acquires collectible toys that he actually plays with, and builds buildings that defy the imagination. But now his restless mind has turned to a new obsession: cloning a mammoth. In a barren province of Canada, a mammoth hunter financed by Christian has made the discovery of a lifetime: an intact frozen woolly mammoth. But what he finds during the painstaking process of excavating the huge creature baffles the mind.

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.

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.

Unverified reports tell of a hidden treasure trove deep beneath the Owl Mountains in Poland. Many have tried, but all have failed to locate the legendary Nazi gold train. Jack Reilly mourns the loss of his grandmother, a Holocaust survivor, and an esteemed historian. In memory of her, the retired Delta operator tours the place of her imprisonment, the Auschwitz-Birkenau State Museum, site of the infamous Nazi concentration camp.

The Ghent Altarpiece is the most violated work of art in the world. Thirteen times it has been vandalized, dismantled, or stolen. Why? What secrets does it hold? Enter UNESCO investigator, Nicholas Lee, who works for the United Nations’ Cultural Liaison and Investigative Office (CLIO). Nick’s job is to protect the world’s cultural artifacts—anything and everything from countless lesser-known objects to national treasures. When Nick travels to Belgium for a visit with a woman from his past, he unwittingly stumbles on the trail of a legendary panel from the Ghent Altarpiece.

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.

A thrill-seeking Harvard linguistics professor and an ultrasecret branch of the Catholic Church go head-to-head in a race to uncover the secrets of the lost city of Atlantis. The ruins of the technologically advanced, eerily enigmatic ancient civilization promise their discoverer fame, fortune, and power...but hold earth-shattering secrets about the origin of man. While world-famous linguist and archaeologist, Thomas Lourds, is shooting a film that dramatizes his flamboyant life and scientific achievements, satellites spot impossibly ancient ruins along the Spanish coast.

Admiral William H. McRaven is back with amazing stories of bravery and heroism from his career as a Navy SEAL and commander of America's Special Operations Forces.

USGS geophysicist, Mac Atwood, and volcanologist, Taylor Reed, survived being swallowed by the Earth during the earthquake swarm. They returned to the ordinarily peaceful and serene environs surrounding Mammoth Mountain and the Long Valley Caldera. When a series of seemingly minor earthquakes take place in the Sierra Nevadas, Mac the seismic detective, expresses his concern to Taylor. Her skills as a volcanologist will be tested as it appears the Long Valley Caldera, the second largest supervolcano in the U.S. behind Yellowstone, is awakening.

From the moment Sam Newman and fourteen others awaken inside metal coffins next to the burning wreckage of a spacecraft, they face a constant struggle to stay alive on a seemingly uninhabited planet light-years from home. Worse, the last any of them remember, they were back home on Earth—at a time when interstellar travel was little more than a distant pipe dream. Survival means finding out who-or what-brought them to this place. Yet what few answers they find amidst the steaming jungles and the ruins of that distant world defy all logic or sanity.

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.

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.

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.