The Arcane Dragon (The Cardinal's Blades #3)

Paris, 1633. Dragons threaten the kingdom.
Emerging from the mists of time, they are determined to restore their absolute rule. Using sorcery, they have taken human form and created a powerful secret society, the Black Claw, which conspires in the greatest royal courts of Europe.
To thwart their schemes, Richelieu has at his disposal a company of adventurers and duelists, rivaling each other in courage, elegance, and cunning. Men and a woman of exceptional talent, ready to brave all dangers and risk their lives for the Crown: the Cardinal's Blades.
But as they approach Mont-Saint-Michel under cover of night, they know that the next challenge could be their last. For, in addition to their enemies' plans, they will have to uncover the secrets of the order of the Chatelaine Sisters who reside in these sacred places. This time, courage and loyalty will not be enough. Rapier in hand, the Blades will have to sacrifice everything if they want to save Paris from destruction.