Try the book Twisted Scriptures by Mary Alice Chrnaloger. It is very very informative to the whole process of how the WTS is able to indoctrinate ( and other "desciplers" as she calls them. ) How the group think is possible with peopel who are unaware they are being controlled to stop thinking critically.
The most important thing to get through is how they are being conditioned NOT to question. After that part is recognised the rest is going to take care of itself.