The fourth book in the 'Marie-Antoinette et ses soeurs' series is due to be released next month. A translation of the Amazon.fr synopsis:
A page turns at the court of Vienna. Marie-Antoinette is twelve years old and is preparing to become queen of France. The young archduchess must learn French and good manners. In the center of everyone's attention, Marie-Antoinette knows that she has no room for error. An incredible destiny awaits!
I have the first two books in this series, but I've yet to tackle them. Based on the title and synopsis, I wonder if this fourth book will be the last in the series!