So either the google search is very good or the AI is not adding any value compared to a „dumb search“?

Which one is it?

I'd say it's not adding any value compared to a "dumb search". Most of those books turned up directly in the google results for things like "basic electronics book" or "beginner electronics books" and so on, or in the listicles that populate the first page of those kinds of results.

thanks for clarifying. disappointing then.