A deep secret that only one man knew...until the whole world found out. Richard Halliburton, the world famous travel writer and explorer in the early 1920s and 1930s, embarked on a journey to explore the world. But he found much more than he ever imagined - and far more than he ever told. Following the end of World War I, the German Reichswehr set out on an ambitious - and unconventional - expedition to rebuild the military’s war chest beyond the auspices of the restrictive Treaty of Versailles.

In the city of Prague, freelance treasure hunter Jules has finally located the bangle stolen from his dying mother, an artifact that may unravel a centuries-old secret: the location of an ancient tomb hidden from the world by one of Christ's disciples. But when a reclusive, ruthless billionaire beats him to the artifact, Jules joins forces with an institute of unconventional archaeologists who reveal to him clues penned two thousand years ago. Clues that support the claim his mother's bangle holds properties that science cannot explain.

Miss Busby helped Major Heathcliff Lennox solve a series of murders at Bloxford in the Cotswolds. Now, she finds herself drawn into a new murder, but this time, it's just her, and she must rely on her sharp mind and sharper wits to catch a Cotswolds killer, along with a handsome police inspector and a reporter who's keen to make her mark.

Jesuit Priest Michael Dominic’s assignment to the Vatican’s legendary Secret Archives results in his discovery of a hidden papyrus: the unpublished writings of Mary Magdalene - a lost record buried in Rome’s deepest recesses. The forgotten relic’s heretical revelation threatens the Vatican’s very legitimacy, and pits Michael against ruthless and powerful enemies. Desperate, he reaches out to Hana Sinclair, an investigative reporter with a record of tackling contentious subjects.

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.

During the election of a new Pope in the mid-18th century, famed violinist Antonio Vivaldi learns of a ring of art forgers who are replacing the Vatican’s priceless treasures with expertly-painted fakes. Desperate, the composer hides a message in a special melody, hoping someone, someday, will take down the culprits....

Clint Redshaw walks into a port facility meeting expecting an ordinary day arguing about the budget. When the shaking starts, he keeps calm. But as the tremors stretch on and on, the ground rips apart, the dock disintegrates, and chunks of land fall into the Strait. When the quake finally ends, there's only one thing on his mind: his daughter. Mika's singing songs and laughing with a gaggle of other sixteen-year-olds as they climb into the Pacific Northwest mountains for a scout weekend. One minute, it's sunshine and good vibes, and the next, it's screaming and chaos.

The first two books in the John Decker series, and the John Decker prequel novella, Soul Catcher. 

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.

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.

Rob Walker has served in countless operations in combat zones across the globe. Now, his mission is personal. After returning home from a combat deployment to Afghanistan, US Army Special Forces sniper Rob Walker is in a race for time to rescue his kidnapped sister from the clutches of a Mexican drug cartel. Having seen too much during a botched drug deal, she is snatched up off the street and handed over to members of a Mexican cartel who are after their payday. Suspecting her of being sold into sex slavery to satisfy the unpaid debt, Rob must act before it’s too late.

Former FBI profiler Adrian West is in Rome for a history conference when she learns that her friend and colleague, Dr. Sebastian Rossi, has been abducted.

Amid a revolution, archaeologist Christopher Jordan and ancient manuscript expert Kathryn Ferguson travel to Syria in search of the original scroll of Marks' Gospel. Paralleling their quest is the story of the evangelist's escape with the scroll from the Roman siege of Jerusalem in 70 C.E., his struggles to complete the manuscript, and his journeys and efforts with the daughter of Peter the Apostle to protect and save it for the ages. For both couples, time is running out and enemies are closing in.

When Liz Kirschener discovers a musical map to Genghis Khan's tomb, her scholarly life explodes into arson and gunfire. Grant Casey brings in his team for a race to the tomb—to prevent Chinese authorities from burying it forever. This novel speeds from Cambridge, Massachusetts, to Cambridge, England, in search of clues—then flies to Inner Mongolia, bringing together a Mongolian singer, Grant's ex-commanding officer, and a Hong Kong billionaire with a secret past. Mongolian traditions clash with modern priorities in a high-stakes adventure to save one of the world's greatest lost treasures.

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.