The best a resistance group can hope for is being damaging enough to choke their enemy little by little while also being hard to root out without causing collateral damage. Because what are AR-15s or whatever else you can get your hands on going to do against the army’s helicopter drones armed with sniper rifles and 360 degree cameras that can detect a target within milliseconds in a kilometer radius just through the reflection on their eye.
As George Washington once said, “A bunch of farmers armed with guns will never win against a trained army.”
You can always check out the e-book version even if you go find a physical copy to read instead. I saw a librarian asking people to do stuff like that since the active use of library services let’s them argue for better funding and services.
Also, see if they have a physical copy at another branch. My local library is part of a network that spans across multiple towns, and they can often get books sent to them from other branches if they don’t have a copy themswlves.