I have a fuck ton of PDFs I've downloaded from various places on many various topics like anarchism, libertarianism, health, history, true crime, esoterica, language, various mythologies and religions, fiction, poetry, sci-fi, self-suffiency, etc. If there is interest I will try to come up with a list (that will take some motivation) and we can take it from there.
There is a lot here about anarchy
https://theanarchistlibrary.org/special/index