The Gilded Wolves (Macmillan USA)
When the all-powerful society, the Order of Babel, seeks him out for help, Séverin is offered a treasure that he never imagined: his true inheritance. Séverin will need help from a band of experts: An engineer with a debt to pay an historian who can't yet go home a dancer with a sinister past and a brother in all but blood, who might care too much. Together, they'll have to use their wits and knowledge to hunt the artifact through the dark and glittering heart of Paris. What they find might change the world, but only if they can stay alive.