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.

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....

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.

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.

Jacob Fehr has devoted his life to neutralizing high-level threats. From his days in Unit 217, an elite division within the Israel Defense Forces, to his current service with the Mossad, Jacob's skills have been honed in the crucible of undercover operations across the Middle East. Little does he know that his most challenging mission is about to unfold.

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.

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.

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.

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.