Sorting books after merging households.

New primary key: language.

I didn't expect I'd have so much trouble distinguishing German from English books (I ended up opening all of them).

Inner monologues:

Fahrenheit 451, by publisher detebe. ... English original, German publisher, probably German, but why does it have the English title, let's open it... Yep, German, ...🤦... The German translation of the title is spelled the same way as the English title.

Don't judge a book by its cover?