There are 5 books in the Bow Street Duchess Mystery series.
The Bow Street Duchess Mystery series does not have a new book coming out soon. The latest book, Fatal by Design (Book 5), was published in October 2023.
The first book in the Bow Street Duchess Mystery series, Murder at the Seven Dials, was published in January 2023.
The Bow Street Duchess Mystery series primarily falls into the Historical Mystery genre.