My mother was recently diagnosed with Stage IV Lung Cancer and this book has been by our sides the whole time. I was quite impressed with the book's clarity of details and "understandability". So often , information in books regarding illnesses of this magnitude can clutter and confuse the mind, this book set me straight. We were able to understand the physicians during various appointments and we were able to ask good questions. Knowledge allowed us a little bit of control in a very out of control situation, and I believe this book helped tremendously.