Map of Bones

When armed men seize Cologne Cathedral during midnight mass and steal the reputed bones of the Magi, Sigma Force commander Gray Pierce is pulled into a hunt across Europe. Teaming up with Rachel Verona, a Vatican insider, he follows alchemical clues toward a buried secret that could threaten the whole world.

Map of Bones is the second Sigma Force novel by James Rollins, first published in 2005. The Dragon Court, a secret society of assassins and adepts, stands in Gray's way as the trail of relics turns from a religious theft into a danger with global stakes.