Acceptable sources for book data and covers

[Emmy]

I wonder if the Dutch HEBBAN site is an acceptable source for book data and covers.
HEBBAN is the largest online readers' community in the Netherlands/
Flanders (Belgium) and is part of the CPNB foundation (Commission for Propaganda of the Dutch Book).
If so, could this site ( https://www.hebban.nl/ ) be added to the list of acceptable sources in the Librarian Manual under the section Dutch?
Thank you for a prompt reply!

[Renske]

According to their copyright disclaimer, permission is needed to use their data, so we can't use it.
And as an occasionally user of that website, I find the data on that website not always very reliable and therefore not a suitable source.

[lethe]

Also, as an online readers' community, it is a competitor of Goodreads.

[Arenda]

And they use only one (most recent) cover per book, with multiple isbn's attached to it, so not reliable.

[Emmy]

Thank you all for your quick reply!