Captain Max Ahlgren is proud to be one of the first team commanders in the Marine Corps’ nascent MARSOC detachment. Finally, the Corps’ elite warriors are working alongside those of other branches, battling insurgents, not on the front lines but behind them. After his first mission, however, Max learns he will be replaced as team commander. 

100,000 years ago the object hit the lake at the deepest point, quickly sinking into its mile-deep Stygian darkness. The sheets of ice closed, time moved on and the land forgot. But over the centuries, legends grew of people vanishing, of strange, deformed animals and of an unexplained luminescence down in the lake depths. When Marcus Stenson won the lucrative contract to create a sturgeon fish farm on the site of disused paper mill on the shore of Lake Baikal, he thought he had won the lottery and refused to listen to the chilling folktales....

Down there, beyond the deepest caves, below the crust and the mantle, there is another world. An old woman locked away in a Russian asylum has a secret - knowledge of a 500-year-old manuscript written by a long-dead alchemist that will show a passage to the mythical centre of the Earth. She knows it’s real because 50 years ago, she and a team travelled there. And only she made it back. Today, caving specialist Mike Monroe leads a crew into the world’s deepest cave in the former Soviet Union. 

Under 30,000 feet of water, the exploration rig Leaguer has discovered an oil field larger than Saudi Arabia. The oil is so sweet and pure, nations would go to war for the rights to it. As the team starts drilling one exploration well after another in their race to claim the sweet crude, a deep rumbling beneath the ocean floor shakes them all to their core. Something has been living in the oil and it's about to give birth to the greatest threat humanity has ever seen.

A team of explorers seek ancient treasures hidden in an undiscovered cave. At first it seems they will return empty-handed. Then their luck changes. But the team's elation is short-lived as they become trapped there in the dark, with little possibility of escape. Then events take an even more terrifying turn. For not all secrets are meant to be found....

Mark Hawkins, former park ranger and expert tracker, is out of his element, working onboard the Magellan, a research vessel studying the Great Pacific Garbage Patch. But his work is interrupted when, surrounded by 30 miles of refuse, the ship and its high-tech systems are plagued by a series of strange malfunctions and the crew is battered by a raging storm. When the storm fades and the sun rises, the beaten crew awakens to find themselves anchored in the protective cove of a tropical island...and no one knows how they got there.

“Shy” Hunt and the tech team from McAllen Integrations thought they’d have an easy job - set up environmental systems for the brand new Hasanova Data Solutions colony, built on the abandoned ruins of a complex known as “Charybdis”. There are just two problems: The colony belongs to the Iranian state, so diplomacy is strained at best, and the complex is located above a series of hidden caves that contain deadly secrets.  

When a sink hole opens up near the Australian outback town of Pintalba, it uncovers a pristine cave system. Sam joins an expedition to explore the subterranean passages as paramedic support, hoping to remain unneeded at base camp. But, when one of the cavers is injured, he must overcome paralyzing claustrophobia to dive pitch-black waters and squeeze through the bowels of the earth. Soon he will find there are fates worse than being buried alive, for in the abandoned mines and caves beneath Pintalba, there are ravenous teeth in the dark.

EarthCore is the company with the technology, the resources, and the guts to go after the mother lode. Young executive Connell Kirkland is the company's driving force, pushing himself and those around him to uncover the massive treasure. But at three miles below the surface, where the rocks are so hot they burn bare skin, something has been waiting for centuries. Waiting...and guarding. Kirkland and EarthCore are about to find out first-hand why this treasure has never been unearthed.

When a plane crashes into the Antarctic ice, exposing a massive cave beneath, a rescue and research team is dispatched. Twenty-four hours later, all contact is lost. Captain Alex Hunter and his highly trained squad of commandos are fast tracked to the hot zone to find out what went wrong - and to follow up the detection of a vast underground reservoir.

One thousand years later. Humanity has left Earth behind and is rapidly expanding throughout the galaxy under the banner of The Union, a white supremacist government who racially ‘purified’ the human race hundreds of years in the past. Living on the fringe of this twisted Fourth Reich society, Dark Horse - the only Black man in the Union - commandeers a vessel and scours the galaxy for his missing teammates under the guise of an Exo-Hunter, seeking out exo-planets to satiate the Union’s need for colonization.

In Fathomless, the greatest predator the world has ever known is coming home in 2016. Carcharodon megalodon. The largest and most fearsome predator to have ever existed on our planet. Rumours of its existence in our modern oceans have persisted for centuries. Now, in a new adventure, the rumours explode into brutal and terrifying reality in Fathomless, by Greig Beck.

Twenty-two-year-old Eileen goes missing while hiking in the remote Ashlough Forest. Five days later, her camera is discovered washed downriver, containing bizarre photos taken after her disappearance. Chris wants to believe Eileen is still alive. When the police search is abandoned, he and four of his friends create their own search party to scour the mountain range. As they stray farther from the hiking trails and the unsettling discoveries mount, they begin to believe they’re not alone in the forest...and that Eileen’s disappearance wasn’t an accident.

A journey into the deepest, darkest jungles of the Venezuelan Amazon...and a primeval place and time that mankind was never meant to exist in. Ben Cartwright, former soldier, home to mourn the loss of his father, stumbles upon cryptic letters from the past between author Arthur Conan Doyle and his great-great-grandfather who vanished while exploring the Amazon jungle in 1908. Amazingly, these letters lead Ben to believe that his ancestor’s expedition was the basis for Doyle’s fantastical tale of a lost world inhabited by long-extinct creatures. 

On the precipice of a cliff, contemplating suicide, dishonorably discharged US Army Ranger Rowan Baer is invited to provide security to a research team visiting the most dangerous island in the world - North Sentinel Island in the Sea of Bengal. Seeking redemption, he accepts. Living among Amazon rainforest tribes, eccentric Israeli anthropologist Talia Mayer is recruited to study the island's elusive inhabitants - the Sentinelese - who have resided on the tropical island since the dawn of mankind.