There are 3 books in the Operation Billionaire series.
The Operation Billionaire series does not have a new book coming out soon. The latest book, How to Marry the Last Billionaire on Earth (Book 3), was published in March 2019.
The first book in the Operation Billionaire series, How to Marry a Billionaire, was published in July 2017.
The Operation Billionaire series primarily falls into the Romance genre.