Jon Atack (born Jonathan Caven-Atack in 1955) is a British author and artist who is widely recognized as one of the most informed critics of the Church of Scientology. He joined Scientology at the age of nineteen in 1974, and was based largely in the Church of Scientology's British headquarters at
Saint Hill Manor in England. During his training, he said he progressed to Scientology's
Operating Thetan level 5 (
OT5), completing 24 of the 27 levels of progress within Scientology. He left the organisation in 1983, disillusioned with the new leadership of
David Miscavige who had taken over in the early 1980s. He wrote that he saw the new management as tough and ruthless, and objected particularly to the 15-fold increase in training fees. He also objected to being told not to have relationships with so-called "
suppressive persons", meaning those whom the Scientology organisation had declared enemies with whom members should not communicate.
Works Jon Atack's work has frequently been cited as a source in academic publications. A notable example is the 2009 volume
Scientology, in which Atack's scholarship is cited by several contributors. Atack is the author of: • • • • • • ==Legal action==