I'm sure these are all entertaining and engaging and reveal some exciting insider details, but it's worth keeping in mind that memoirs like these are closer to fiction than most things we think of as "nonfiction".

They're individual testimonies, often nearly impossible to verify, and written in an era where "autofiction" and "creative non-fiction" are mature commercial genres with their own tropes, standards, forms, and conceits.

If you're intellectually curious about "cults, scams, and schemes", there's a whole other -- drier but more earnest -- world of nonfiction to be found in places like JSTOR or the catalogs of academic presses.