Walmart is meh, as was "Fully automated luxury communism."
I'm going to start the struggle session and say Stalin and Lenin's work on Nationalism. Frankly I'm fully on Rosa's side there, excepting only anti-colonial struggles. Even there it's a dangerous game.
Furr's stuff, because he provides shitloads of sources but cherrypicks the fuck out of them even though I agree with like 70% of his conclusions.
Bookchin's "Post-scarcity anarchism" was inspirational to me 15 years ago but has faded as I've gone deeper into theory. It's still useful though. Marcos' stuff still slaps though, despite a superficial similarity.
"The Coming Insurrection." Blergh, so many missteps of the 90s are this book's fault.