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....

When Vatican archaeologist Marcus Russo uncovers the fabled Nazi Gold Train buried deep within the Owl Mountains of Poland, he expects to find a forgotten trove of looted treasures. Instead, he unearths a chilling codex that points to a dark and dangerous legacy: Operation Eisenkreuz, a Nazi plan to seed chaos and power across the globe long after their fall. But Marcus soon realizes the train’s secrets are only the beginning.

Amid the grandeur of the Vatican, the bones of Saint Peter—the Church’s most sacred relics—hold secrets that could reshape its history. Father Michael Dominic, Prefect of the Vatican Secret Archives, uncovers a mysterious, nearly forgotten inscription linking Linus, Saint Peter’s first successor, to foundational decisions that shaped the early Church. What begins as a scholarly exploration of Linus’s legacy quickly turns into an urgent quest to protect the truth.

Professional treasure hunter EDEN BLACK is no stranger to action. After all, the artifacts she spends her life returning to their rightful owners aren’t always easy to access. When Eden’s father dies in a plane crash, her life’s turned upside down. Grief turns to fear when she learns that it wasn't an accident. Everyone involved in an archaeological dig twenty years ago has met with a similar untimely end. Everyone that is, but Eden who was ten at the time.

Luke Daniels is in London, between assignments with the Magellan Billet, when he receives a frantic call from an old friend. Jillian Stein is in trouble. She made a mistake and now her life may be in danger. She needs Luke’s help. Immediately. Racing to Belgium Luke quickly finds that she was right. A shadow team of highly-trained operatives are there on the hunt. Intervening, he finds himself embroiled in a war between two determined sides—one seeking the truth, the other trying to escape the past—a war that has already claimed one life and is about to claim more.

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Dominic’s assignment to the Vatican’s legendary Secret Archives results in his discovery of a hidden papyrus: the unpublished writings of Mary Magdalene - a lost record buried in Rome’s deepest recesses.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.

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.

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.

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.

One touch from the Spear of Odin can transform a man into a berserker—an unstoppable rage-fueled killing machine. Dane Maddock and “Bones” Bonebrake, former Navy SEALs turned treasure hunters, are on assignment in Norway—their mission: Stop the rogue biotech company ScanoGen from getting their hands on the legendary weapon.

Jack Reilly is nearly finished with an extended vacation in Rome. Alongside him is Mayleen Wu, former Chinese operative and Jack’s newfound love. Posing under aliases, they attend a private event set against the backdrop of the historic Roman Colosseum, one that features a remarkable display of artifacts once belonging to the elusive Ninth Legion. Among these treasures is the headpiece to the legion's quasi-sacred aquila, their revered eagle standard.

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.

When a NASA satellite discovers an astonishingly rare object buried deep in the Arctic ice, the floundering space agency proclaims a much-needed victory, a victory with profound implications for NASA policy and the impending presidential election. To verify the authenticity of the find, the White House calls upon the skills of intelligence analyst Rachel Sexton. Accompanied by a team of experts, including the charismatic scholar Michael Tolland, Rachel travels to the Arctic and uncovers the unthinkable.

Amid the grandeur of the Vatican, the bones of Saint Peter—the Church’s most sacred relics—hold secrets that could reshape its history. Father Michael Dominic, Prefect of the Vatican Secret Archives, uncovers a mysterious, nearly forgotten inscription linking Linus, Saint Peter’s first successor, to foundational decisions that shaped the early Church. What begins as a scholarly exploration of Linus’s legacy quickly turns into an urgent quest to protect the truth.

Zahra Kane is a brilliant and daring archaeologist. The former British Army Intelligence linguist has used her fluency in a laundry list of languages, as well as her combat training, to succeed at the highest level. The intrepid adventurer isn't afraid to get her hands dirty or blow past the point of no return to obtain her prize. Late one night, she receives a frantic phone call from her estranged brother, an Egyptologist who's been tasked with examining a newly discovered tomb and the prize it contains: the original Book of the Dead-a scroll made of human skin and penned in human blood.