Deep in Antarctica, two researchers find an enigmatic black sphere suspended in the heart of a huge crater. Neither man is ever seen again. Decades later, reality fractures. A Manhattan skyscraper vanishes into thin air. An airplane crashes in the Sahara Desert—its existence defying logic. Across the globe, breathtaking technology and mysterious artifacts appear, all leading to one chilling truth: a parallel Earth is breaching the boundary between realities.

Finally reunited on an advanced, alternate Earth where the mighty Roman Empire never died, James, Hannah, and Wolf now stand at the precipice of an interdimensional war threatening to obliterate everything they've fought to protect. As the fabric of existence continues to unravel, unleashing anomalous storms and creating rifts large enough for unstoppable warships to traverse, the trio must find a way to repel a superior force bent on conquest.

When the solar flare took out the world's power… nobody could explain why the street lights still glowed in Jakarta. Was it a signal from space? When the Mars Reconnaissance Orbiter (MRO) transmits strange images of the red planet: a scientifically unexplained light phenomenon on the summit of Elysium Mons has the experts both concerned and baffled. A team needed to check it out. The mission to Mars was set. Now, they had to build the team.

Astronaut Lee Rifkin's life is about to change. NASA has done the math. The space object named Cassandra 22007 is not behaving as expected. He will lead a team on a cutting-edge ship to get a closer look. But another group wants to get there first. Who is this shadow organization that seems to be one step ahead of them? Agent Jenna Haynes works to put together the pieces that will pull the veil off those who seem to have known about Cassandra's arrival since long before NASA spotted it. What is their goal?

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.