In 1655, a group of explorers from the Emerald Star entered the Namibian Desert in search of an ancient relic rumored to be hidden in a secret temple. None of the crew ever returned - but stories of their mysterious demise continued to be told. In the present-day Turkish subterranean city of Derinkuyu, a strange wooden placard is discovered floating in an old well. It’s covered in the script of a language long forgotten, but Sam Reilly has seen the text before. The words suggest an ancient race might still exist, and are in the process of building a new temple. The question is - is it the same temple where Dr. Billie Swan is being held prisoner?

The offer - $20 billion split between four leading scientists on alternative energies to purchase and then squash their research lines, which include the recent discovery of a powerful new energy source capable of replacing mankind’s reliance on fossil fuels. There’s no doubt their discovery is worth 10 times that much. But will any one of them live if they refuse? At the same time, the greatest technological advancement in warfare since the creation of the atomic bomb has been discovered and is being offered to the highest bidder.

Present day, in the Weddell Sea off the coast of Antarctica, a woman wakes up on a cruise ship to discover she’s the only person left aboard, despite no apparent fault with the ship. Sam Reilly, already on a rescue mission to Antarctica to save five French scientists, may be the only person standing in the way of the completion of The Cassidy Project.

A Russian cargo ship sinks in the shallow waters of the Bering Strait, and somehow vanishes without a trace. In the Colorado Plateau Desert, a cowboy follows a river of sand into an undiscovered ruin. A tunnel-boring operation between the Alaskan and Siberian peninsulas is stalled when its largest burrowing machine disappears into an abyss. Sam Reilly leads a search and rescue mission for the missing ship and crew. What should be a simple operation quickly turns into something much more dangerous.

On the 18th of February, 1812, the Emily Rose became shipwrecked on the southern coast of Australia. The survivors are forced to walk nearly 1,000 miles through the unexplored land to reach the only settlement, Sydney Cove. Nearly 200 miles inland, they come across the remains of a monstrous ship, far bigger than anything the British Navy had ever constructed. Through basic communication achieved with the natives, they learned that the ship had been there for a very long time...Maybe 1,000 years?

Fresh from his success with the search and rescue of the USS Omega Deep, Sam Reilly was looking forward to some much-needed rest. Not everyone had the same idea though. When a panicked man with purple eyes grabs him at gunpoint and takes him hostage, Sam knows that this is more than a mere ransom opportunity; this man is scared of something. And Sam is going to have to find what it is if he wants to get out of this alive. 

On January 22, 1945, a secret weapon of unimaginable power was brought from the quiet town of Haigerloch in Germany’s southwest and loaded onto a plane waiting at Stuttgart. Less than a dozen people knew of the weapon’s existence, and even less knew where it was being taken. The aircraft, its crew, and its remarkable cargo were never seen again. Until now.

On board Phoenix Airlines Flight 320, Andrew Goddard awakens to discover the cockpit empty and all the passengers unconscious. In the Colorado Monarch Mountains, an old gold miner discovers a fiendish stone mask sealed inside an obsidian chamber. Sam Reilly has just three weeks to find out how the two unlikely events are connected, and the secret behind it might change everything we thought we knew about humanity.

On May 18th, 1863 - the day the siege of the Confederate stronghold at Vicksburg began - a secret war chest was removed by an ironclad and taken away. It contained a covenant capable of altering the entire course of the Civil War. Its destination was Washington, D.C., a place it never reached. In the present day, Minnesotan senator Arthur Perry enlists Sam Reilly to track down his son, who went missing while following a strange lead in the centuries-old search for the fabled Meskwaki Gold Spring within Lake Superior. These two events, separated by more than 150 years, are inextricably linked....

A civilization stolen from the history books. A billionaire's obsession to unlock its secrets. A brotherhood determined to hide the truth. And time is running out. Only a handful of people know what destroyed the ancient Atlanteans, whose very existence is a secret that they will kill to protect. Unfortunately, the very same catastrophe that destroyed that once proud civilization is drawing near once more. The question is, can marine biologist Sam Reilly discover the truth in time to prevent it?

On March 11, 2011, the Japanese fishing trawler Hoshi Maru accidentally hauled up something deadly into its live-fish hold. The crew, having discovered their mistake, raced toward the harbor in the hope that they might survive. They never made it. Presumed sunk by the tsunami that ravaged the coastline of Japan, its crew were declared dead. Seven years later, the shipwreck washed up on Cannon Beach, Oregon....

In the dead of night, a decrepit, unmarked motor yacht drifts into the medieval port of Vernazza, Italy. The run-down vessel forms a jarring contrast to the pastel colored tower homes and terraced vineyards surrounding the natural harbor along the coast of Cinque Terra. Less than 50 yards away, a man wakes up on board a small rowboat, covered in blood. Lying next to him is a woman with two - execution style - bullet holes to her forehead.   

Sam Reilly and his team are called in to investigate what happened on board Carpe Diem. But what at first appears to be a simple boating accident soon turns into a deadly game of international intrigue - sending America and Russia racing toward each other on an unavoidable collision course.

The US Navy’s most advanced nuclear attack submarine, the USS Omega Deep was the first to disappear. It was followed swiftly by the loss of the Russian spy vessel Yalta and then the Feng Jian, a Chinese aircraft carrier. Sam Reilly and his unique team of troubleshooters are requested at the express order of the president of the United States of America to locate the Omega Deep and determine the cause of these unexplained tragedies before they lead to World War III.

A city cloaked in a legend too fanciful to be true. An ancient tribe, who have vowed to protect their Gods until the end of time. A shipwreck scattered with gold, and drawings of a mythical beast. Sam Reilly is on the hunt to find an ancient tomb, before El Dorado is lost forever....