A great breakdown! Gets the idea of using terms already being searched across really well.

It’s also communicates the caveat that traffic must be flowing in order for this to be effective, depending on the size of searches. Many other articles fail to mention this.

I would add to this conversation, being in consideration of purchase intent behind a term. This one addition that can make a big difference in something like selling more books.

A next step in this journey is consideration of SERP which is a distinct and arguably more powerful subset of SEO. This is because can get you into Featured Snippets at the top of Google pages, even with little traffic. Landing SERP is basically a Google judgement call. You could say it’s Google’s form of “curation".

Then even beyond that there is Structured Data which lays out details for things such as a book, in a form that’s easily consumable by search engines and so can get you on displays that you wouldn’t otherwise. Such as the horizontal top page lists we see on some searches.