Due to current events, there are some free ebooks about how to do radical organising out from Haymarket books. (They are not normally free)
nprofile1qy2hwumn8ghj7un9d3shjtnddaehgu3wwp6kyqpq3sc45xpdt6wmszwv2w43pl5wy04ka5lax9s3hjj9yw2lg0vfdt4qfcvldl (nprofile…vldl) suggests these three that may be of extra interest:
Let This Radicalize You: Organizing and the Revolution of Reciprocal Care https://www.haymarketbooks.org/books/1922-let-this-radicalize-you
Hope in the Dark: Untold Histories, Wild Possibilities https://www.haymarketbooks.org/books/791-hope-in-the-dark
How We Get Free: Black Feminism and the Combahee River Collective https://www.haymarketbooks.org/books/1108-how-we-get-free
I haven't read any of these yet, so can't comment on the contents. I suspect they're all North American, but applicable to radicals outside that core target audience.
Ruttenberg's entire post is worth a look, imo [uspol] https://www.lifeisasacredtext.com/organize/
[Boosts encouraged]