Broke and desperate, paleontologist Grant Coleman gets the chance of a lifetime exploring a long-sealed cave, the fabled home of a gigantic creatures. NPS Ranger McKinley Stinson discovers a rancher’s prize bull has been butchered by an airborne killer, and tracks the blood trail back to the re-opened cavern. But as she’s about to arrest the trespassers, the unstable roof collapses, trapping all.

The first mission to Europa – Jupiter's enigmatic moon – has landed, and humanity’s darkest fears are about to awaken. For years, mankind has speculated that this frozen world harbours a hidden ocean twice the size of all Earth’s oceans combined – an ocean potentially teeming with life. Driven by this tantalising mystery, they venture forth to unlock its secrets. But what they discover in the abyssal depths is far beyond anything they could have imagined.

A man of great power and wealth, Robert Jensen wasn't content with the ordinary. His drive to conquer the world led him to its darkest corners. There, he began to assemble a collection of monsters beyond belief - Sasquatch, Thunderbirds, Skunk Apes, and more.

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.

National Park Service Rangers Kathy West and Nathan Toland are the only ones stationed at Fort Jefferson, a restored Civil War fort sixty miles off Key West, Florida. Two overnight campers go missing but before the rangers can investigate, shady Homeland Security Agent Glen Larsson arrives to close the park due to a purportedly imminent red tide. Things quickly escalate out of control when mercenaries arrive to back up Larsson and imprison the rangers. Larsson’s plan is to free a cast of giant crabs to overrun the park, and then Florida beyond.