If you want a good continuation, check out Jordan Peterson, who has a much wider framework into which TLP's somewhat narrow worldview can be fitted. He is also a practicing clinical psychologist, as well as a professor. This video summarises a lot of his ideas, but they are fully explained and justified in his university courses, which are all on the channel. "Personality" is a first year course, and "Maps of Meaning" is I think taken by third or fourth year psychology students.
https://www.youtube.com/watch?v=MCOw0eJ84d8
(You're probably best off ignoring the culture war drama he's currently embroiled in. Unfortunately the youtube algorithm has now placed him firmly in the alt-right nexus because of this, so his videos might shit up your reccommendations. This is not a reflection of his ideas, far from it.)
http://www.ribbonfarm.com/the-gervais-principle/
Then I decided to read much more material from the blog, but for the most part I have been disappointed. I feel like the authors there love intellectualism to the point that they create fancy constructs even when there isn't much return. Basically I feel like it's trying too hard to be clever. I have found a few gems there, however.
Not trying to pick a fight with anyone, just wanted to share my own experience here.