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 in a very concise, readable format, explains most aspects of living that people are dealing with all the time, such as failure, marriage and why life can get duller as we get older. It is an excellent first book to read.