I was interested in Scientology as a microcosm of society around the time alt.religion.scientology appeared in the early 1990s. Scientology documented everything about how it runs, even management is scriptural, and only Hubbard could write scripture so it is like a specimen that's been fixed to a microscope slide.
Since then renegade "Free Zone" Scientologists have put all of his writings online so it is very accessible.
Dianetics is the Sequences of Scientology in that it is a long, windy, and nonsensical book that selects for people who are perseverant readers who are impervious to critical thinking. (Like one of those Nigerian scam emails.)
Hubbard's hypnotic language is demonstrated in his Philadelphia Doctorate Lectures where he not only mentions the hypnotist Milton Erickson but uses Erickson's techniques extensively. (There is no record of Hubbard meeting Erickson but Hubbard and Erickson were both highly active at the same time in Arizona and I think Hubbard must have sat in on Erickson’s lectures.)
(That is, that weird ramblely kind of writing is by no means innocent but it is misparsed by many people's minds and helps create an altered state of consciousness.)
Hubbard's most satanic (in opposition to conventional Eastern & Western religious ideas) works are Introduction to Scientology Ethics and A New Slant on Life. The first one describes an elaborate system of punishments that are applied to anyone who violates group norms and a system of evaluation that guarantees you will violate those norms by accident. The list of "ethics conditions" is folded so the positive conditions come first and a person who starts reading at the beginning and doesn't go all the way through will miss the batshit crazy stuff. The second describes how a Scientologist is supposed to disconnect themselves from anyone who disagrees with their spiritual journey.
Something Scientology shares with the EY cult (as well as the LaRouche organization and the third international) is the proliferation of front groups. Scientology has Narconon, Criminon, The Way to Happiness Foundation, and many others. The EY cult has "effective altruism", "rationalism", "longtermism", "AI safety" and probably those parties Aella used to run.
It's a typical path that a coercive group makes multiple 360° turns. "Effective Altruism" seems designed to attract morally weak people but seems rational enough at first. I mean, it seemed to make sense when Bill Gates insisted on funding only international NGOs that could prove the value of what they were doing.
Once, however, you are funding "longtermist" organizations that are concerned with imagined problems on the way between here and the glorious future that we've turned all the planetary mass of the Milky Way into Dyson spheres there are no results to measure!
It is like the technique a stage hypnotist uses of putting volunteers through a number of screens that rapidly selects the most suggestible and/or likely to go along subjects. Both in the short term and long term this process expels the trouble makers and leave behind the potential Manchurian Candidates.