It is winter in Area X. A new team embarks across the border on a mission to find a member of a previous expedition who may have been left behind. As they press deeper into the unknown, navigating new terrain and new challenges, the threat to the outside world becomes more daunting.

"In the winter of 1885, Lieutenant Colonel Allen Forrester sets out with his men on an expedition into the newly acquired territory of Alaska. Their objective: to travel up the ferocious Wolverine River, mapping the interior and gathering information on the region's potentially dangerous native tribes. With a young and newly pregnant wife at home, Forrester is anxious to complete the journey with all possible speed and return to her. But once the...

To save the world and our future, Sigma Force must embark on a dangerous odyssey into an ancient past whose horrors are all too present in this page-turning thriller.

Thirty-eight years after first contact, Lord Commander Grayson St. Clair leads the Tellus Ad Astra on an unprecedented expedition to the Galactic Core, carrying more than a million scientists, diplomats, soldiers, and AIs. Despite his reservations about their alien hosts, St. Clair is deeply committed to his people, especially after they're sucked into a black hole and spat out four billion years in the future.

Off the coast of Brazil, a team of scientists discovers a horror like no other, an island where all life has been eradicated, consumed and possessed by a species beyond imagination. Before they can report their discovery, a mysterious agency attacks the group, killing them all, save one, an entomologist, an expert on venomous creatures, Professor Ken Matsui from Cornell University. Strangest of all, this inexplicable threat traces back to a terrifying...

"To stop the world from burning, it's up to Sigma Force to uncover a secret buried at the heart of our planet. The Titan Project--an international research station off the coast of Australia--discovers a thriving zone of life in an otherwise dead sea. The area teems with a strange bioluminescent coral that defies science, yet holds great promise for the future. But the loss of a military submarine in the area triggers a brutal attack and sets in motion...

"The riveting tale of two pioneering botanists and their historic boat trip down the Colorado River and through the Grand Canyon. In the summer of 1938, botanists Elzada Clover and Lois Jotter set off to run the Colorado River, accompanied by an ambitious and entrepreneurial expedition leader, a zoologist, and two amateur boatmen. With its churning waters and treacherous boulders, the Colorado was famed as the most dangerous river in the world. Journalists...

"Lone McGantry is a former Indian scout for the Army, now in his late thirties, a drifting horse wrangler, cowboy and guide. He's not fully ready to settle down but leaning gradually toward that lifestyle if he could find the right conditions. The Nebraska Sandhills of the 1880s are a vast, untamed expanse of treeless, rolling hills scoured by harsh wind and blistering sun. Into this rugged landscape former Indian scout Lone McGantry reluctantly agrees...

In this gripping thriller, a scientific expedition in Antarctica stops for a live news feed. As the CNN journalist Gracie Logan begins her report, a massive, shimmering sphere of light suddenly appears in the sky, enveloping the ship in luminous white light before disappearing as mysteriously as it arrived--the entire event witnessed by an incredulous world audience. Meanwhile, a monk in Egypt experiences visions that seemed connected, and back in...

Meet the Secret Explorers - a band of brainiac kids from all around the world. Everyone in this group of young experts has a speciality, from outer space to dinosaurs, and each story follows a character who gets chosen for a "secret exploration". In this fun, fact-filled children's book, engineering expert Kiki and Connor the marine biologist are sent on a mission to the Arctic. There they discover a research vessel studying the effects of climate...