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 the first book I read on the subject of Scientology. It was great because it covered so many topics -- from "The Anatomy of Failure" to "Is it Possible to be Happy?" to "How to Live with Children" to "Justice" to "You Can Be Right," and many more. I discovered in these concepts a lot of old friends and some startling new ideas. It really got me looking at life from some interesting new viewpoints.