The Patty and Ginger series does not have a new book coming out soon. The latest book, On Her Own (Book 6), was published in January 1964.
The first book in the Patty and Ginger series, We're Going Steady, was published in January 1958.
The Patty and Ginger series primarily falls into the Romance genre. This young adult series was written for ages 12-17, but can be enjoyed by adults too.