Incorrect Author and series

[Tiffany]

Incorrect Author info, should be attributed to author (Wilhelm Grimm (Author), Jacob Grimm (Author)), not translator/illustrator

Series: Tolkien's Bookshelf

Obtained appropriate information from:
https://www.worldcat.org/title/grimms...

[Renske]

Added authors.
From what I see that series seems a collection/imprint, not something we consider a series.