There are 3 books in the Behind the Palace Doors... series.
The Behind the Palace Doors... series does not have a new book coming out soon. The latest book, Crowned for the King's Secret (Book 3), was published in December 2023.
The first book in the Behind the Palace Doors... series, The Marriage That Made Her Queen, was published in October 2022.
The Behind the Palace Doors... series primarily falls into the Contemporary Category Romance genre.