There is much truth to this post about about #math textbooks.

@oantolin one of the best textbooks I ever read was Calculus Made Easy

It is 116 years old

It still slaps

@Elizafox @oantolin I made an updated edition based on the @gutenberg_org copy. It updates various small things like Edwardian terminology:
https://www.sunclipse.org/2023/10/calculus-made-easy/
Calculus Made Easy | Science After Sunclipse

@bstacey @Elizafox @oantolin I rather liked "Quick Calculus", which was an excellent introduction to the basics of calculus (and some trig).
@varx @bstacey @Elizafox @oantolin: Bought that one myself recently when I went back for an engineering Master's after a long time out of education.