There are 2 books in the Petra Piitalaat Jensen series.
The Petra Piitalaat Jensen series does not have a new book coming out soon. The latest book, The Twelfth Night (Book 2), was published in January 2019.
The first book in the Petra Piitalaat Jensen series, The Calendar Man, was published in November 2018.
The Petra Piitalaat Jensen series primarily falls into the Mystery genre.