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 my life in general. It touches on so many areas of life. I loved the opening quote form L. Ron Hubbard which said, "The human mind is capable of resolving the problem of the human mind." That pretty much tells it all.