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 was one of the first ones I read and I found the information in it to be extremely enlightening and highly comforting to my troubled life. I was astonished at the truths I read and how much difference just reading them made for me.