bookmarking this thread so fast.

random, user-friendly, surface level stuff:

Lenin, State and Revolution and April Theses. Imperialism is very good, but it's not user-friendly and I'd just recommend a youtube video on it instead.

Pannekoek, Worker's Councils

Kropotkin, Conquest of Bread

Chomsky, Manufacturing Consent

The fifth book is reader's choice:

Brady, Spirit and Structure of German Fascism

Rodney, How Europe Undeveloped Africa

Klein, Shock Doctrine

Graeber, Debt

Bukharin, ABCs of Communism

Berkman, ABCs of Anarcho-Communism

Peck, Washington's China