There are 3 books in the Gentlemen of Mystery series.
The Gentlemen of Mystery series does not have a new book coming out soon. The latest book, The Gentleman of Holly Street (Book 3), was published in December 2022.
The first book in the Gentlemen of Mystery series, The Housekeeper of Thornhallow Hall, was published in August 2021.
The Gentlemen of Mystery series primarily falls into the Gothic Category Romance and Historical Romance genres.