There are 5 books in the California Billionaires series.
The California Billionaires series does not have a new book coming out soon. The latest book, Billionaire Unreachable ~ Wyatt (Book 5), was published in August 2023.
The first book in the California Billionaires series, Billionaire Undercover ~ Hudson, was published in July 2020.
The California Billionaires series primarily falls into the Contemporary Romance genre.