I've had a longtime friend who's a good guy and all but subscribes to a lot of SJW-ish beliefs but seems pretty reasonable overall. I've made no effort to redpill him (or anyone for that matter) based on the recommendations in TRP sub. Anyway he isn't a nutter and actually goes out of his way to help people but I feel like his worldview is idealistic and constricted based on a fairly privileged upbringing (I was as well which can always be thrown back at me), having married his longtime high school girlfriend, and doing pre-law as his undergraduate. He ascribes to socialism, strong views and female equality, etc. From what I've heard from Manosphere types, law school is a pretty uncertain route to head towards in life. I'd like to provide him some kind of edification to stiffen his worldview but I don't know where to start. Are there any books that could help him into the ideas here: male and female selfishness in particular. I'm not trying to boldly make a convert here, but maybe plant a seed that could help him down the road.

edit: I'll add that we're young and just getting started in life. I myself am not yet a sterling example of what TRP thinking provides which is why I avoid making bold claims to others.