many of us have read the book or in the process of reading it. It teaches you how to use Cognitive Behavior techniques which is the listening to the brain and bringing closure to stuff we keep allowing to run around in our heads.
Chapter 4 is rather intense ... remember that you have to read the entire book from front to cover and do the exercises ... don't obsess about the exercises.
I recommend that you then select something you are not doing in your life and use the book to help you process what you are saying to yourself and then begin the painful process of bringing closure to that area of your life. I chose something simple like learning to sew ... it was the summer of 2004 ... and it helped me to practice using the CBT processes.