''Dianetics: The Modern Science of Mental Health'' is Creator/{{L Ron Hubbard}}’s self-help booklet, proverbial to Scientology and one of the most sold self-help books out there. How much of this is because of his followers buying massive quantities of it in order to artificially boost sales is an exercise left to the reader's imagination.

Very briefly, the book proposes the idea that everyone has unconsciously a physical pain or painful emotions that must be repressed in order to achieve self-fulfillment. The rest of the book gives you tips to do it.

Considering LRH and his followers’ status, we ask you please remember the RuleOfCautiousEditingJudgment.

!!''Dianetics'' has examples of the following tropes:

* ArcWords: '''Survive!'''
* ArtisticLicenseMedicine: Let's just say that most of Hubbard's theories about mental health were first rejected by the scientific/medical community in the 1950s, and they haven't garnered any more acceptance to this day, and leave it at that.
* AuthorTract
* CureYourGays: The Church disputes this, however. One spokesperson claims that homophobic bigots may have edited in all the anti-gay content.
* DoorStopper: Yes, it’s a long book.
* FlameBait: As typical for anything to do with Scientology.
* FootnoteFever: Lots of them, explaining terminology. It quickly reaches ViewersAreMorons territory.
* LavaAddsAwesome: The cover and television commercials for the book usually feature an erupting volcano. There's no official explanation for what a volcano has to do with Dianetics, but volcanoes do factor into the Scientology story of Xenu.
* OrwellianRetcon: Hubbard re-edited the book several times as the years passed. The book you can find today is very different from the original published in 1950.