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 is an excellent introduction to the basic concepts of Scientology. I've studied philosophy before, but nothing ever came close to describing what life is and what it's all about as well and as understandably as this book. It's really a masterpiece.