Lord of Stone — Keith Brooke

Trace: a country where magic is dying out. A country at war with itself. A country where the prophecies of the Book of the World have started to come true.

Bligh: a young foreigner, drawn irresistibly to the war in Trace. A man who has rejected religion, yet appears to be possessed by one of the six Lords Elemental.

Bligh thinks he's going mad, but if he is then it's a madness shared by others...