Norm Chris wrote it. I have talked with a few guys who have bought it and hear it is pretty good. I personally do not do residential work so I have no need for it. From what I understand it is geared in helping pass the NATE exams. Hope this helps but I know Norm will be along soon with his sales pitch !
Actually the book addresses much more than just NATE certifications. Plus, it covers more than just residential. I included a great deal of light commercial as well.
Even if you never intend to take any of the certification exams the book should be of use to anyone who wants to learn the business better. Taking practice quizzes and reading the tips is another way of learning.
Besides, I need the money and so does HVAC Talk. Consider it your way of supporting this site and my kids.