The War In The Dark

Europe. 1963. And the true Cold War is fought on the borders of this world, at the edges of the light.
 
When the assassination of a traitor trading with the enemy goes terribly wrong, British Intelligence agent Christopher Winter must flee London. In a tense alliance with a lethal, mysterious woman named Karina Lazarova, he's caught in a quest for hidden knowledge from centuries before, an occult secret written in a language of fire. A secret that will give supremacy to the nation that possesses it.
 
Racing against the Russians, the chase takes them from the demon-haunted Hungarian border to treasure-laden tunnels beneath Berlin, from an impossible house in Vienna to a bomb-blasted ruin in Bavaria where something unholy waits, born of the power of white fire and black glass . . .