It's even weirder than that. If in the screen of the first screenshot, where "david van reybrouck" is filled in in the search window, I click on the magnifying glass to reperform the search, I get this:
https://fmlekens.home.xs4all.nl/nonce/kobo3.jpg
So, different search results, because the site has automagically decided I want to look only for English language books, not for "all languages" (previous screen). And different interface.
Why? Who designs this? And why? How does this work?
The URL for the first page is
https://www.kobo.com/nl/en/author/da...l&fcmedia=Book
And for the second it's
https://www.kobo.com/nl/en/search?qu...fclanguages=en