• Debt: The First 5000 Years, which has a good deal of information about the economies of ancient societies, including their economic models and the factors leading to things like the rise and decline of currencies.
• The Origins Of The Modern World, which goes into great detail about the staggering violence and brutality capitalism inflicted in building the wealth of Europe, and demonstrates that capitalism is and always has been a state enterprise.
• Caliban And The Witch, a feminist Marxist work that details the material circumstances that drove witch hunts and suppression of women's rights in early modern Europe. Disclaimer: I haven't read very far into this one yet, but what I've seen is good.
• The State And Revolution - where Lenin details his model of the state as a means by which one class imposes its will on another.
• Imperialism: The Highest Stage of Capitalism - Another Lenin work, in which he describes the processes by which capitalism leads to concentration in production, which in turn leads to the dominance of finance capital, which in turn engenders imperialism.
• Podcast rather than a book, but Hell On Earth is a series about the Thirty Years War that highlights the economic power struggle of what is often seen as a strictly religious conflict, co-hosted by our own large adult son.

Seconding this request. I have enough knowledge of theory to argue with liberals, but not nearly enough to do what I actually want to do, which is portray societies and cultures while worldbuilding in an interesting way. I love writing, but all my plots usually just become yet another fantasy (or sci-fi) communist revolution story lol