Stolen from a cave in Islamic Spain, it re-appeared briefly centuries later, first in Samarkand and then in the deserts of Libya. Now Alex, torn from his life in London, must begin the final, perilous search for an ancient cloth, allegedly bearing the image of God.
The Keeper's Cup by Ken Fry
The Imperial Alchemist by A.H. Wang
The Newton Code by Liam Fialkov.