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.

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.  

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. 

One of the most stunning abilities ever seen...has just been born into the eyes of a six-year-old girl. For one very special reason. Something is about to happen. Something unstoppable, and something terrible. An event that can do more than just change human history. But mankind has a secret. A little girl named Sarah. Afraid and alone, and under the care of an inexperienced social worker. A young woman about to discover that she will do anything to keep Sarah alive. Because there is much more to Sarah than meets the eye.

After a mysterious global event known only as “The Change”, six strangers wake up in an underground research facility where they learn that they’re part of the Extinction Trials - a scientific experiment to restart the human race. But the Extinction Trials harbors a very big secret. And so does the world outside.

Rex Walker always wanted to be like his father: a daring, adventurous man, traveling the world in pursuit of mysterious relics. While teaching anthropology at a Boston college, Rex attempts to bury the past, until he discovers a hidden clue he can’t ignore. With the help of a former student, he teams up with an alien-obsessed billionaire, and they search for the fabled Bridge. As an unidentified object nears Pluto, speculation surges. Some hail it as the homecoming of a distant alien race, and this cult is unwavering in their efforts to usher our world into a new era.

"The audio production of Khalifa’s twisty thriller begins with a terrorist takeover of a Manhattan skyscraper and features a spirited reading by Brick. Former FBI agent Alex Blackwell initially sounds annoyed as he is dragged from retirement to handle a hostage situation in a New York City high-rise. His attitude shifts to that of a determined professional when Seth, the terrorist leader, demands a safe escape and a trade."

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.

Between 2017 and 2021, the US military admitted to having undeniable evidence that UFOs (now UAVs or UAPs) are here and defy the laws of physics. When Jason Ramsey, a popular science-fiction writer, becomes obsessed with the subject, he undertakes a relentless quest to uncover what is really going on. After recruiting Tessa Barrett, an extraordinarily talented mercenary, Jason devises a risky, desperate plan to get to the bottom of it all. But the truth is far more shocking, convoluted, and dangerous than anyone could have guessed, and he has no idea who he can trust. 

Lucas Tappan, a wealthy and eccentric billionaire and founder of Icarus Space Systems, approaches the Santa Fe Archaeological Institute with a proposal for an excavation - and a hefty donation. Hoping to bring welcome publicity to the privatized space travel industry, he wants to finance a careful, scientific archaeological excavation of the 1947 Roswell Incident site. The Institute agrees and Nora Kelly, much to her annoyance, is tasked with the job. Instead of the evidence of a crashed UFO, Nora's excavation immediately uncovers two unknown murder victims buried at the site. 

Archie Mint has a secret. He’s led a charmed life - he’s got a beautiful wife, two impressive kids, and a successful military career. But when he’s killed while trying to stop a robbery in his own home, his family is shattered - and then shocked when the other shoe drops. Mint’s been hiding criminal secrets none of them could have imagined. 

In the summer of 1601, Galileo Galilei made a startling discovery in the mountains of Eastern Italy that, if made public, could shatter faith in religion, bring down governments, and lead to worldwide turmoil. For more than 400 years, the secret has been guarded by a small group of incredibly powerful people, willing to do everything in their power to keep these discoveries from being made.

Nate and Brooke Martin arrive at their summer cottage along the rapidly gentrifying Great Lakes shoreline. On a morning stroll along the beach, Nate finds an unusual gold coin half-buried in the sand. Where did it come from? Teaming up with reclusive ex-Coast Guard officer and Great Lakes master of the deep Abner Hutch, Nate dives for clues to the treasure's origins. But when word leaks that there may be a fortune hidden under the waves, they find themselves hunted by mega-rich residents up the coast who are willing to do anything to advance their extravagant lifestyles.

Two weeks after his 18th birthday, everything changes for Evan Nash. When he injures his head after being run down on his bicycle, he begins having strange, harrowing visions whenever he tries to sleep. He turns to psychiatrist Shannon Mayer for help. Mayer has troubles of her own: her daughter has been kidnapped, and she's desperate for answers. Though she's at first skeptical of Evan's accounts, it quickly becomes clear that his mysterious ailment may be the key to finding her child.

A 4,000-year-old mystery lurks in the hills of Georgia. While investigating a strange series of ancient symbols, an archaeologist vanishes, and a professor he entrusted with the secret is murdered. Former government agent Sean Wyatt learns of his friend's disappearance and the murder. Now he must unravel the clues to the ancient mystery that holds incredible power.