If you want to find out more about Dianetics and Scientology, the best way to do this is to read an L. Ron Hubbard book on the subject. I personally recommend you read Scientology: A New Slant on Life.
This book really helped me with the quest I was on to discover alternative methods and philosophies and ways to self-improve. I no longer had to study speed reading, or read Kahlil Gibran or do Haiku poetry to express my feelings--all of what I sought was wrapped up in this neat little book. The basics of human character and the mind are concisely laid out in short, easy to understand chapters.