Pawn in Frankincense

In this fourth book in the legendary Lymond Chronicles, Francis Crawford of Lymond desperately searches the Ottoman empire for his kidnapped child.  Somewhere within the bejeweled labyrinth of the Ottoman empire, a child is hidden. Now his father, Francis Crawford of Lymond, soldier of fortune and the exiled heir of Scottish nobility, is searching for him while ostensibly engaged on a mission to the Turkish Sultan. At stake is the political order of three continents, for Lymond's child