Language and brainwashing

Hi,

I'm looking for books on the role of language in brainwashing. Specifically, (recent) German/English studies on the use of language in cults, and very specifically, in Scientology. But any book vaguely related to the topic might turn out useful, so I'm not too picky at this stage. I can already speak the Scientology language pretty well, so I'm not looking for a general introduction, more a psychological or purely linguistic view.

Thanks in advance!