There are 6 books in the Hilde Cracks the Case series.
The Hilde Cracks the Case series does not have a new book coming out soon. The latest book, Thief Strikes! (Book 6), was published in February 2019.
The first book in the Hilde Cracks the Case series, Hero Dog!, was published in September 2017.
The Hilde Cracks the Case series primarily falls into the Mystery genre. This chapter book series was written for ages 7-10, but some older readers may still like to read these books.