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 Dianetics: The Evolution of a Science.
It was my introduction to Scientology and it's story of L. Ron Hubbard's journey of the discovery of the reactive mind inspired me to become a Scientologist and so changed my life completely.