The Lucifer Gospel: Penguin Publishing Group

Young archaeologist Finn Ryan and charismatic pilot and photographer Virgil Hilts are scouring the Sahara for the long-lost tomb of an apostle. But they find something they weren’t looking for: signs of a decades-old murder, along with an ancient Roman medallion bearing the infamous name of a fallen archangel. It doesn’t take long for them to realize that they’ve found a piece of a much bigger puzzle—and a trail of clues that could get them killed.
Forced to flee from a relentless enemy, Finn and Virgil are pursued across the globe. From the sinister ruins of an ancient monastery to a sunken ship in the Caribbean, the two desperately search for a truth that can save their lives, but might shake the foundations of history...