I'm currently a mod here on lemmy. I would at the very least click the link before banning or removing. In the link, they'd see this note:
L’Anarchia was written in 1891, appeared in English translation in the monthly journal Freedom (September 1891—June 1892) and was reprinted as a pamphlet by Freedom Press in 1892.
The mod of r/books should be even slightly aware that anything printed before 1929 is public domain