In May, Churches of Scientology around the world will celebrate the publication of "Dianetics: The Modern Science of Mental Health." A best-selling book by L. Ron Hubbard, it is now available in 53 languages with sales exceeding 21 million copies.

The Dianetics phenomena started in May 1950 when author and humanitarian L. Ron Hubbard's visionary work on the human mind, its problems and their resolution, first hit the bookstores.