"Book One" of Dianetics was Dianetics: The Modern Science of Mental Health, released on May 9th, 1950. That book is a handbook for what became a new type of therapy called "auditing" — still in use — that enables any two relatively strong people to unlock hidden clarity within the mind. As L. Ron Hubbard discovered in his research prior to writing the book, within every individual is a complete "time track" consisting of the complete moment-to-moment recordings of their entire existence. Many people do not think of themselves as explorers, yet embarking on a journey into your own past is perhaps the greatest exploratory expedition any individual could ever embark upon. The reward is a better grasp of who you are and how you came to be who you are!
"Auditing" is comes from audio which means to listen. The auditor guides but does not tell a person what to think, because in Dianetics the whole point is to enable the individual to think for himself. Used as intended, Dianetics principles cause a person to "wake up" into greater possession of their own thought processes. The reverse use of these same principles, known as "Black Dianetics" makes a person more suggestible, less aware and less able to think. Observing anyone with some experience with the subject, it is easy to know whether the technology was used correctly or in reverse. Luckily, the remedy for Black Dianetics is within the subject itself. Dianetics can repair itself.
Life itself has a deadening effect on a person. Painful experiences and losses accumulate and lessen overall awareness and ability. Dianetics is designed to turn the clock back.