hey, author here. I always find it weird to see HN posts where you have to pay to read what it says (what's the point?) so here are 6 sample pages from the zine if you're interested in seeing more of what's in it:

* CSS isn't easy: https://wizardzines.com/comics/css-isnt-easy

* Inline vs block: https://wizardzines.com/comics/inline-vs-block/

* Specificity: https://wizardzines.com/comics/css-specificity/

* Centering: https://wizardzines.com/comics/css-centering/

* Hiding elements: https://wizardzines.com/comics/css-hiding/

* The box model: https://wizardzines.com/comics/box-model/

I also put together a site with a few examples of CSS behaviour I find surprising here: https://css-examples.wizardzines.com/