Joshua T. Calvert

Gavin and his crew have left the borders of the human hegemony and are on their way to Sol to stop the dawning catastrophe....

A coming interdimensional war. A race against time. A thrill ride like no other. Multimillion-copy bestselling authors Douglas E. Richards and Joshua T. Calvert team up for the first time to deliver an explosive, high-stakes science-fiction thriller, one that will leave you breathless. Deep in...

Andal has fallen, engulfed by the Never, and torn from the galaxy. Gavin and his crew of rebels have escaped the mysterious stealth ship and are stranded on an alien world, while Janus Darishma tries to figure out what happened on the edge of the Empire and what part Fleet Admiral Marquandt...

James, Hannah, and Wolf face their greatest challenge yet in the pulse-pounding conclusion to The Rift trilogy. 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...

Betrayed by shadowy government forces, FBI agents Thor Dejeune and Maya Wilson are forced into hiding. Across the Atlantic, Marcus Brown is abducted and ordered to uncover a secret he never knew existed: What is the artifact—and why is half the world desperate to find it?

Humanity's only colony in the distant Archimedes system is in turmoil... Contact with Earth has been lost for generations and mysterious waves of disappearing colonists have been shaking the five moons for decades. When suddenly a wormhole appears in the middle of the system, the Union Navy...

In Lake Maracaibo, in the northwestern part of Venezuela, a long-hidden extraterrestrial artifact underneath the ocean floor triggers a disaster....

FBI geneticist Mason Brown and Danish Interpol agent Jonna Nielsen have just seventy-two hours to find the missing man they call The Immortal. He's on the run across Europe and his genetic material may be the most valuable commodity in human history.

The situation on Earth is coming to a head; while the infestation was brutally contained in Siberia, it has spread uncontrollably in Los Angeles. Jenna wants to prevent the spore from causing even worse damage at all costs and tightens the noose around the Initiative.

Dr. James Barron narrowly prevented a catastrophic interdimensional invasion in The Rift. But now he must deal with a myriad of threats as great as the one he overcame. Threats including growing rifts in the fabric of reality, anomalous superstorms, and conspiracies that just might span worlds...

Deep beneath the Pyramid of the Sun, archaeologist Charles Bowen and his protege Marcus Brown uncover an artifact that rewrites history—and paints a target on their backs.

In 2018, Canadian archaeologist Ron Jackson makes a mind-boggling discovery in Antarctica - right before disappearing without a trace, leaving behind only his controversial theory that humans have lived on Earth far, far longer than we think they have....

For generations, we colonized worlds, and the human race spread throughout the galaxy. One discovery could end it all.

A mysterious signal. A start-up that wants to change the world. A future that no longer belongs to us. Contains all three books in The Stolen Future series.

Alone in deep space, she wakes to find her crew dead, her ship failing, and a mysterious signal pulsing from a distant planet. Is she truly alone?

From the darkness of space, a global killer asteroid is on a collision course. Will the world's turmoil destroy mankind before it arrives?

When NASA's Sentinel I satellite detects an impossible reflection and a mysterious signal from Shackleton Crater, the world is thrown into chaos. The discovery points to one chilling truth: an alien artifact lies hidden beneath the lunar surface—and it wants to be found.

Sol has fallen, but the fight continues to rage. Oberon stayed behind, nothing more than a ghost on a radar screen, watching as the Clicks increase their presence on planet Earth. What's going on with the humans left behind? No one knows. Humanity's fleet admiral has survived! And he's issuing...

Humanity's endless war and a crew of outcasts on a decommissioned warship who could change the future. First contact with the alien "Clicks" led to a generations' long war. The Terran Federation still knows very little about the enemy. Captain Konrad Bradley commands the decommissioned...

Deep space holds secrets… …and one astronomer for NASA has found a big one. But it's not what she thinks. Dr. Melody Adams, a physicist at the Gemini North Observatory, was studying Pluto in the telescope data, and it struck her as odd. The numbers didn't make sense. Could there be an...