HP Forums

https://venhance.github.io/napkin/Napkin.pdf "Personal exposition project of mine aimed at making higher math accessible to high school students."

I know a similar project (great commitment) that was handwritten in Italian: https://spazioinwind.libero.it/corradobrogi/index.htm

Do you know anything similar? ( [massive] math expositions by less known authors)

Infinitely Large Napkin book was listed in general math category, here.

Site has books from many subjects, not just mathematics.

http://www.sciencebooksonline.info/about.html Wrote:All texts are available for free access, authorized by their respective authors or publishers -- no pirated books here!

thank you for the links Albert!