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 new Sigma Force thriller, Commander Gray Pierce and his team of globetrotting problem-solvers run up against something they aren't sure how to handle. In a part of the Congo, the environment seems to have been altered. Flora and fauna are apparently undergoing some sort of accelerated evolution; at the same time, the people there seem to have taken several steps backwards on the evolutionary ladder, making them unresponsive and virtually immobile....

Internationally reknown oceanographer Steve Zissou and his crew - Team Zissou - set sail on an expedition to hunt down the mysterious, always elusive, possibly non-existant Jaguar Shark that supposedly killed Zissou's partner during the documentary filming of their latest adventure. On this journey, Steve's crew are joined by a young airline co-pilot, who may or may not be Zissou's son, a beautiful journalist who has been assigned to write a profile...

Could dinosaurs still roam the earth? In the newest discovery in the 'Ology series, readers come face-to-face with living, breathing dinosaurs. Dinosaurology is filled with flaps and booklets offering dinosaur lore, along with such novelties as a sample of dinosaur skin, a pouch of ground stegosaurus horn, and more.

"For eons, the city of Troy--whose legendary fall was detailed in Homer's Iliad--was believed to be myth, until archaeologists in the nineteenth century uncovered its ancient walls buried beneath the sands. In the frozen tundra of Greenland, a group of modern-day researchers stumble on a shocking find: a medieval ship buried a half-mile below the ice. The ship's hold contains a collection of even older artifacts--tools of war--dating back to the Bronze...

"Off the coast of tropical Mauritius, an ecological catastrophe with global implications is occurring. The ocean's floor is collapsing at a rapid rate. World-champion free diver and marine biologist Carrie Anderson joins a scientific expedition determined to discover the cause-and how to stop it. But what they uncover is even more horrific. Deep beneath the surface, something is awake. Something hungry. Something...cold."--

In this Sigma Force prequel, an inexplicable explosion rocks the antiquities collection of a London museum, setting off alarms in clandestine organizations around the world. And the search for answers takes Lady Kara Kensington, her friend Safia al-Maaz, and their guide, the international adventurer Omaha Dunn, into a world they never dreamed existed: a lost city buried beneath the Arabian desert. But others are being drawn there as well, some with...

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...