As you know, the Hilda franchise consists of three art forms. These are comics (graphic novels), picture books and animated series.
The article about the Hilda books says that the books are based on the animated series. That is, an animated series was made based on comics, and books were made based on the animated series.
However, I have questions on this topic. If the release dates for the animated series and books given on this wiki are correct, then the chronology is as follows:
04.09.2018 The first book
21.09.2018 The first season of cartoon
2019 Second & third books
Books 1-3 correspond to the first season of the animated series.
17.11.2020 Books 4, 5, 6
14.12.2020 The second season of cartoon
Books 4-6 correspond to the second season of the animated series.
It turns out that sometimes the animated series overtook the books, and sometimes the books overtook the animated series. Is it possible that both the books and the series are actually based directly on the comics (then the information in the book article is wrong)?
Here it should also be noted that the character designs in the books and in the TV series are similar to each other and differ from the designs in the comics.