A cool book I like is This Soviet World. It shows the Soviet Union as experienced by the author in the 1930s.

No problem! If you finish them all and for some reason want more, I have plenty of other recommendations, and you can DM me if you have any questions. I personally really like reading the modern author I linked, they have a bunch of niche, specific essays like Dialectical Matetialism in the context of Quantum Mechanics (makes sense if you’ve read Elementary Principles of Philosophy) or Marxism vs Anarchism, or why Cooperatives aren’t Marxist (not a purity test! They are socialist but not Marxist). Have fun!