Deep Waters - Sammy Greene series, #3

For centuries an ancient shipwreck in azure Greek waters has concealed an astonishing truth. The drowning of an underwater cameraman, then the murder of a highly respected academic- seemingly isolated tragedies? When radio talk show host Sammy Greene and ex-cop Gus Pappajohn investigate, they uncover an ancient and modern mystery-conflicts between pagans and saints, archeologists and treasure hunters.
From the marble steps of the Parthenon to the peaks of the hidden monasteries of Mount Athos, the two risk their lives in a desperate race to find the lost chapter of human history.