Started watching this documentary on the FDLS polygamist mormons. Usual cult stuff that is familiar. In episode 1 the abused women talk about things they enjoyed. One thing they liked was going to their library. It was a highly censored library though, even cut out pages of encyclopedias.
As they panned the book shelf I thought that looks like the Insight books. Sure enough Insight books made it into the cults library. Literally LOL . 28 minute mark E1 Net Flix.