The Medusa Stone is an adventure novel by Jack Du Brul.

Ten years ago, the spy satellite Medusa burned upon re-entry-but not before its sensors revealed a secret buried deep in the Earth hidden for thousands of years from the eyes of humanity.

A priceless discovery that some would die to find - and kill to possess... With uncanny talent as a geologist and a quick intelligence matched by savvy and courage, Phillip Mercer is fast becoming a legend in powerful circles around the world.

When one of them snatches and holds his oldest friend, Mercer is forced to act by the kidnappers...whose allegiance is a mystery, but whose viciousness is not.

In a harsh and hostile land ravaged by violence, Mercer races to find the one thing that will save his friend.