Instructions are crystal clear, but you don't learn too many styles and the ones they choose are really overused fonts that every Instagram influencer uses. I'd rather see the typefaces that modern calligraphers are using (and I follow several). So, if you want to learn influencer fonts — this book has you covered! That's just me, though. Whitney chose what she wanted and did a great job with them.
They do a great job of showing stoke direction and include practice sheets.
One thing I would have liked to see in this book was tips or discussion on pen tip pressure because that's critical. There is also no talk about other techniques like using color, splatter, diluted inks, etc. which is a shame because those are popular modern techniques.