There are 1 books in the Behind the Billionaire's Doors... series.
The Behind the Billionaire's Doors... series does not have a new book coming out soon. The latest book, Undone in the Billionaire's Castle (Book 1), was published in April 2024.
The first book in the Behind the Billionaire's Doors... series, Undone in the Billionaire's Castle, was published in April 2024.
The Behind the Billionaire's Doors... series primarily falls into the Contemporary Category Romance genre.