Seeing the conversations around this topic in the post Most Western Parties Are Ossified and Failures I thought some folks might find value in this organizing guide created by USU. It draws from numerous articles they’ve written about organizing ML orgs from the ground up.
It really depends on the people who are interested but for the more borderline I’ve seen suggested Angela Davis’s Gender Race and Class or Michael Parenti’s Blackshirts and Reds and then Engels The principles of communism.