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 The Scientology Handbook.
This book really helped me with by using the information found in this book, I was able to stop the pain of an eleven year old boy. He had suffered with headaches for two years and was doing terrible in school. I used the information in the book and got him to apply it (very simple things like stop eating sugar and to take vitamins) and then I showed him how to apply L. Ron Hubbard's study methods and his pain is gone!