Snapping: America's Epidemic of Sudden Personality Change is a 1978 book written by Flo Conway and Jim Siegelman which describes the authors' theory of religious conversion. They propose that "snapping" is a mental process through which a person is recruited by a cult or new religious movement, or leaves the group through deprogramming or exit counseling. Political ideological conversions are also included, with Patty Hearst given as an example.Two editions of the book were published, the first (1978) by Lippincott Williams & Wilkins and reprinted in 1979 by Dell Publishing. A second edition (1995) was printed by Stillpoint Press, a publishing company owned by the authors.Conway and Siegelman wrote an article in Playboy and Science Digest in 1979 and 1982 respectively to advertise and discuss their book and findings. Source: Wikipedia (en)