There are 4 books in The Not So Saintly Sisters series.
The Not So Saintly Sisters series does not have a new book coming out soon. The latest book, The Perfect Arrangement (Book 4), was published in November 2020.
The first book in The Not So Saintly Sisters series, The Perfect Debutante, was published in February 2019.
The Not So Saintly Sisters series primarily falls into the Historical Romance genre.