With my past experience of trying to get people to read the most basic, short, easy and lib-friendly texts and 10-20 minute articles, I wouldn't go for the approach of dropping a reading list on them unless they are the types who read encyclopedias for fun, or they actually ask you for reading material. And I wouldn't go straight to communist theory with proletariat and classes and scary German philosophers and Russian revolutionaires either.
Theory is essential but you need to ease people into it. Make sure that you are up to date yourself with literature that deals with issues relevant to your friends, and that isn't just straight up Marx or Lenin because libs are primed to be hostile towards those. In the case of US aggression, I would recommend stuff like Washington Bullets, Killing Hope, Against Empire, or The Jakarta Method. Then, since you mentioned these are people close to you that you interact with on a regular basis, spend time with them, listen to them, and capitalize on every opportunity to drop more of your leftist analysis while pointing at the resources that you used to build it. Essentially, you have to market reading to them by being well informed on topics they care about and showing the work that got you here.
I know a few people similar to your friends who are starting to question the official narrative on countries like Iran and the DPRK. One of them asked me for a link to Killing Hope, but this was after he brought up North Korea himself in light of recent events and we spent some time talking about the Korean War, its many associated US crimes against humanity, as well as how this pattern of US aggression repeated throughout the post WW2 world. I have no idea if the guy will actually read it, but if he does it will be easier to build on that and pitch Lenin to him.
We are fighting against a wall of heavily reinforced anticommunist narratives and liberal civil religion, which is why I prefer the cautious approach. Marxist-Leninist reading lists are for people who have broken through and decided they want to make sense of the world after the liberal narrative has collapsed. You need to work with your friends at their own pace and drill at the cracks that form organically until they get to that point.