A FREE Online
Many of the books that you might spend a fortune buying can be found on a site called Anarchy Archives on the net as free downloads.
When you click on the name of the Anarchists who appear on the site (don't overlook the "Lesser But Bright Lights Link"! Many of them are in no wise lesser light, IMO.) you'll see a link that says "Collected Works" on their page.
That link will take you to entire books, articles, essays, etc. Most are in English, but some are in other languages as well.
Doreen Ellen Bell-Dotan,