I must be honest and say that this book is one that has helped me the most in shifting how I think, what I do from my thinking and letting go of things that needed to be gone long time ago.
There is homework in it, it is very effective and very powerful. Very easy read, I read it once through and then went back to do what it said.
If you are looking for a change in your life, get this book and start reading. I read Chapter 3 (I knew what it contained and was anxious to get started) and then went back to the begining. Do not skip the Introduction or the Prelude. Very good stuff in it.