There are 2 books in The Wilhelmina Adventures series.
The Wilhelmina Adventures series does not have a new book coming out soon. The latest book, Who the Heck Is Harvey Stingle? (Book 2), was published in June 2016.
The first book in The Wilhelmina Adventures series, Wilhelmina and the Willamette Wig Factory, was published in August 2015.
The Wilhelmina Adventures series primarily falls into the Mystery genre.