I have this book and have read it many times. I completely believe in his theories and recommendations. Smoking nothing is the best way, absolutely. Some e-cig smokers even go to no analogs (reg. cigs) and then to not even vaping.
It’s ironic that Mr. Carr died of lung cancer. However, his seminars and his book still holds true. Take the whole addiction thing and turn it backwards. Smokers are trying to get back to the feeling they had when they had never smoked before.
Yeah, it’s sad that lung cancer got him, but he almost certainly got an extra decade or two out of life because he quit. Five packs a day and that guy would have been dead possibly before 60. And in those extra decades, he probably saved thousands of lives. Hopefully mine as well.