the book presents an introduction that sets the stage for the glossary itself. It informs readers about the purpose of the work, which is to cater to fans of 17th-century literature and specifically those who appreciate Madame de Sévigné's writing. The author emphasizes the enduring relevance of Sévigné's letters, which not only detail the social dynamics of her time but also showcase her masterful use of language, and the opening notes the extensive education and literary influences that shaped her correspondence. Additionally, it touches on the importance of her letters as historical documents, highlighting their significance for understanding the cultural context of the period. (This is an automatically generated summary.)