Congress of Secrets

Under a new name and nationality, she returns to Vienna determined to save her father even if she has to resort to the same alchemy that nearly broke her before. But she isn't expecting to meet her father's old apprentice, Michael Steinh ller, now a charming con man in the middle of his riskiest scheme ever.

The sinister forces that shattered Caroline's childhood still rule Vienna behind a glittering fa ade of balls and salons, Michael's plan is fraught with danger, and both of their disguises are more fragile than they realize. What price will they pay to the darkness if either of them is to survive?