I will also say, and meant to mention in my original comment, <i>good</i> textbooks are beautiful things.<p>Most textbooks by the time I got to HS (mid-1990s) were meh. And they seemed to be getting worse each year. Compared to the books my parents and previous generations experienced. (Specifically for math.) Older books tended to be small, concise and precise. Think Sipser&#x27;s automata text, but for everything in math. Being a third generation mathematician certainly helped by providing me access to an older library of books than a lot of my high school and college peers realized were available.