At first, it is a rescue mission, but soon Danny, Stefan, Ed, and Elsa find themselves in a fight for survival. A perilous journey across an underground sea brings them to a lost island and fresh adventures, but their attempts to return to the surface only serve to make their situation worse.

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. 

A man. His ex-girlfriend's cat. A sadistic game show unlike anything in the universe: a dungeon crawl where survival depends on killing your prey in the most entertaining way possible. In a flash, every human-erected construction on Earth - from Buckingham Palace to the tiniest of sheds - collapses in a heap, sinking into the ground. The buildings and all the people inside have all been atomized and transformed into the dungeon: an 18-level labyrinth filled with traps, monsters, and loot.

Recon Marine Conor McCall didn’t expect action during his training op in the icy waters off Norway. But when a bizarre summer fog engulfs his boat, he and his team find themselves in a fight against strange, cruel monsters from the depths of the North Sea. When even their allies are enemies, the Recon Marines must do what they have always done: adapt or die. But with a world of ice and monsters seeking to destroy them, every second is mission-critical.  

A series of violent shark attacks off the shores of northern California draw the attention of pessimistic Detective Luke Jansen. Despite reports of shark sightings, the injuries are more reminiscent of a chainsaw-wielding maniac. Things get stranger when marine biologist Elise Sheldon encounters the creature. Exhausted and traumatized, her claims that the beast is a Helicoprion are dismissed. With little help from the police department, Luke and Elise form an unlikely alliance that puts them face-to-face with a violent man-eating shark, and its terrifying reason for existing.

Jedidiah Huckleberry Smith spent his entire life searching for the raider who mutilated him as a child. Finally, giving up on a trail long grown cold, he leaves his outlaw past behind and starts over in a remote town in Wyoming. Now, teaming up with a beautiful but naïve paleontologist, they stand between his adopted town and its destruction by an army of barbaric prehistoric apes and dinosaurs. But Jed’s past has come back to haunt him. The man he searched for is discovered in a position of power, and Jed must choose...

Lawless, British Columbia is on edge after a powerful earthquake jolts the region, quickly followed by a string of savage animal attacks. Newly stationed to the area after her predecessor mysteriously disappears, Conservation Officer Christine Moon needs to calm the jangled nerves of the small mountain town. Awakened from ancient slumber, something stalks the swirling, grey mists that surround Lawless. A beast with a gnawing hunger that grows stronger by the minute - its only thought, to satisfy its ravenous appetite.

Alex Hunter - in the mission that turned him from a normal man into the weapon known as the Arcadian - and the elite team of soldiers known as the Hotzone All-Forces Warfare Commandos must enter a hostile country to rescue a defected Chechen researcher from the centre of a country at war. But the HAWCs are not the only ones looking for the rogue scientist and the mysterious package he carries with him. A brutal and relentless killer and his death squad are on the trail, too - and they bring a savagery with them that Hunter and his team have never witnessed before in modern warfare.

For more than 150 years I've served the Kingdom of Sena. Through four kings and a queen. Two wars and a rebellion. I've founded and taught at a magic school. I've fought against beast waves and dungeon breaks. But now? Now, the one close friend I had left has passed. So, I'm done with their politics and their economics. The short and busy lives of humans are more burden than benefit on the weary soul of this half-elf.

There’s a doorway on Mars that has mankind’s greatest minds perplexed. Deep beneath Aeolis Mons an ancient secret is revealed, and a team of explorers led by Forest Judge, Deputy Commander of Gale Base Alpha, are dispatched to investigate. The prehistoric gateway reveals a biosphere preserving Earth’s distant past, and as Judge and crew stand on the threshold of mankind’s greatest discovery the Martian ground trembles. A roar thunders from within, the doorway closes, and the team is trapped.

In Michigan’s Upper Peninsula, Kira Brine hires a group of friends to help restore her private cottage. The fun little endeavor quickly turns tense as they hear strange noises in the woods. Branches snap and leaves rustle in the distance. Animals seem uncharacteristically frightened and then mysteriously disappear as the hours go on.

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....

Janner Igiby, his brother, Tink, and their disabled sister, Leeli, are gifted children as all children are, loved well by a noble mother and ex-pirate grandfather. But they will need all their gifts and all that they love to survive the evil pursuit of the venomous Fangs of Dang, who have crossed the dark sea to rule the land with malice. The Igibys hold the secret to the lost legend and jewels of good King Wingfeather of the Shining Isle of Anniera. 

There’s something growing deep in the old Angel Mine - something the Native Americans warned us about - And now it’s rising again. Mitch Taylor, ex-Special Forces medic, is seeking a quiet life in the town of Eldon. Tragedy has dogged his life, and he sees the small friendly place as a second chance. But buried deep below the friendly smiles and quaint painted houses is an old abandoned mine that holds a legend of an ancient and terrible god. In the mine’s labyrinthine depths, something has been growing, something from a time of myth when ancient gods strode the Earth.

Something went wrong in the Mars Felicity Station. A gate to another reality was opened, and a mysterious alien plague threatens humanity. When communications with the station are cut, the Perihelion crew is sent to find out what happened. Outmatched and unprepared, they’re forced to make war on this new enemy and rescue what remains of the survivors.