When ex-Air Force computer genius Josh Lane is kidnapped at gunpoint and wakes up in a cell, he's faced with a deadly ultimatum: Solve a computer problem...or die. With no way out and no idea who his captors are, Josh must use all his skills and quick thinking to survive. But as he delves deeper into the complex puzzle, he realizes that the stakes are even higher than he thought.

It was just a family vacation...until the terrorists came aboard. Jackson Barr, Jr., along with his wife and kids, are enjoying a Caribbean cruise when all hell breaks loose. At port in Jamaica, an explosion rocks the ship, and all passengers are sent to shore on lifeboats, where they are told they'll be reunited with their children.

Out of work and on the run after a shocking betrayal by his brothers-in-arms, the ex-Special Forces commando hasn’t stopped moving for months. He can’t. Some of the same soldiers who left him for dead in the Middle East still want his head. And they’re getting closer. So far, he’s been lucky. But Dak is low on money and nearly out of time. All he needs is an easy gig. A place to lie low, bank some cash, and quietly figure out his next move.

An ancient medallion is unearthed in Pueblo, Colorado, revealing a secret that will rewrite the history of North America - the Vikings somehow made it to the continent's interior, centuries before Columbus made landfall, and there they built a city of gold. But today the Coelho medallion has been stolen, and a linguist and researcher has been abducted in connection with the crime. Could the abductors be after the fabled city of gold? Or do they have a more sinister plot in mind?

A 4,000-year-old mystery lurks in the hills of Georgia. While investigating a strange series of ancient symbols, an archaeologist vanishes, and a professor he entrusted with the secret is murdered. Former government agent Sean Wyatt learns of his friend's disappearance and the murder. Now he must unravel the clues to the ancient mystery that holds incredible power.

March 11, 2004. The Madrid train bombings kill 193 innocent civilians. What the terrorists didn’t know was on that fateful day they also succeeded in creating their worst nightmare. No one knew who he was, what he looked like, where he came from, nor who he worked for. He was a sniper who could take a target out from 800 yards to a mile. He could kill with a long gun, short gun, or no gun. He was lethal with edged weapons, explosives, poisons, or no weapon at all. Targets could be executed from afar or die with his breath in their faces.

An explosion rocks Yellowstone. A strange disease begins to spread. A supervolcano threatens to erupt. And none of it was an accident. A reclusive Yellowstone park ranger is forced into action, teaming up with a beautiful woman from the CDC. Harvey Bennett isn't a trained killer, but he'll fight for what's right. And he'll do anything to take down the terrorists behind the attack. From Yellowstone across the American landscape, Harvey and Juliette must do what it takes to survive, before it's too late.

When ex-MI5 operative Joe Mason is sent to Rome to guard an elderly professor and his daughter, he thinks he’s in for an easy ride. But on their first day in the Vatican secret archives, a masked assassin gains entry, shoots Joe’s client in cold blood and steals an ancient manuscript. Giving chase, Joe can’t imagine what could lie within those pages that would make someone willing to kill. The search for answers leads Joe and his comrades in a race against time, across continents and into treacherous mountains.

Unverified reports tell of a hidden treasure trove deep beneath the Owl Mountains in Poland. Many have tried, but all have failed to locate the legendary Nazi gold train. Jack Reilly mourns the loss of his grandmother, a Holocaust survivor, and an esteemed historian. In memory of her, the retired Delta operator tours the place of her imprisonment, the Auschwitz-Birkenau State Museum, site of the infamous Nazi concentration camp.

In 1939, a secret airship departed Nazi Germany in the dark of night filled with some of the most influential people of its time. Its cargo: a complement of rich Jewish families carrying their most valuable possessions. One such item among them was as dangerous as it was priceless. The airship never reached its destination. In 2015, Sam Reilly, a marine biologist and wealthy son of shipping mogul James Reilly, discovers a missing clue about the lost airship, and what follows is a violent treasure hunt.