Cyril Ronald Vosper (7 June 1935 – 4 May 2004) was an anti-cult leader, former Scientologist and later a critic of Scientology, deprogrammer, and spokesperson on men's health. He wrote The Mind Benders, which was the first book on Scientology to be written by an ex-member, and the first critical book on Scientology to be published (narrowly beating Inside Scientology by Robert Kaufman). Source: Wikipedia (en)