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: The Fundamentals of Thought.
This book really helped me with sorting out and explaining the concepts of mind, body, and soul. It showed, in a tangible way, how you can improve your own condition in life -- it has very little to do with chemical processes in your brain.