I've been a sub and a commenter on this sub for a while (all account), but recently I have become intrigued with the concept of "the Dark Triad" and I want to learn more. I've read the 48 rules (and considered the 50 but haven't read it).

I was wondering if TRP had any other sources or readings that I could get into.

I find the concept really intriguing because two of the three hit close to home. Give me more reading material please!