In the Spirit of Crazy Horse was a pretty radicalizing read for me. It's ostensibly about the injustice suffered by Leonard Peltier after two FBI agents were killed on Oglala land in 1975. But what it really tells the story of is the complete pillaging of a land where people already existed and how treaties have never been worth the paper they were inked on to the US government.
re: password managers, I can recommend BitWarden. Open source and free for personal use. Can donate for a couple enhanced features. Also have the option of self-hosting.
I read Lenin's The State and Revolution and followed it with a chaser of Parenti's Blackshirts and Reds a couple years ago. A fine pairing.