It’s a reasonable concern for a publisher. A book being good doesn’t necessarily sell books. But having a famous name on it does.

Fineness aside, the main quality you want in your ground coffee is a very even size distribution around your desired size. If a lot of the resulting grinds are smaller or larger, especially very fine dust, the resulting brew will be much less balanced. If you want to, you can buy a sifter set to sort out different particle sizes. If you really want to, there’s software to do optical size distribution analysis.

Exactly this. That’s why I installed an aftermarket exhaust when I did it on a previous car

Oh lord, where do I find someone to treat me like that

Start really wishing I could talk to you

Yes!

Yeah 😳

Oh, god, never quite that perfect