I read some of this stuff when I was younger, and for various reasons my current timeline (lol see what I did there?) isn't allowing for me to pursue these paths, but watching TPTR and talking with you all has evoked some of this material so I'm linking this for people who may not be familiar with it. I still haven't completed The Secret Histories but I know there is some reference in there to Crowley and the Theosophists. I feel like some of the Black Lodge/White Lodge can be referenced to Bailey and her company. By the way, "they" say you shouldn't study this stuff without the guidance of an adept before age 40. Let the buyer beware. 

https://www.lucistrust.org/books/alice_bailey_books