Beyond the Back To Basics series F@ mentioned, these are some of my favorites, even if the authors aren't always:Bob Black - Anarchy 101 https://theanarchistlibrary.org/library/bob-black-anarchy-101. Non sectarian take on what anarchy is and what it isn't.Lawrence Jarach - Instead of a Meeting https://theanarchistlibrary.org/library/lawrence-jarach-instead-of-a-meeting-by-someone-too-irritated-to-sit-through-another-one. Post-left critique of how the anarchists recreate leftist structures.These (available from LBC or The Anarchist Library):Anarchy Works by Peter Gelderloos: https://littleblackcart.com/index.php?dispatch=products.view&product_id=451. Pretty comprehensive, I don't agree with all of Peter's conclusions (he's a little soft on the civ thing, and while I am still a slave to it, I have a hard No).Anarchy 101 https://littleblackcart.com/index.php?dispatch=products.view&product_id=101 A lovely crowd sourced affair from this very website.
re: crimethinc., um, stuff... It is engaging but tends towards an activisty "Do Something" perspective. I really liked Fighting For Our Lives when I first read it (when it first came out, I like it less so now. Days of War, Nights of Love has been influential to a lot of people of a certain era, though it didn't resonate as much with me. I found Expect Resistance more engaging, as it had a (semi?) fictional narrative that made it more readable.
yeah, i wonder what i would think of "fighting for our lives" now, i haven't read it in well over 15 years i think.
the anarchist library is invaluable for all the stuff you can find there.