That every human being is different and that depending on the circumstances an assumed weakness can be a strength and vice versa is not a major enlightment. Susan Cains story of the intraverts who indeed sometime achieve more than those assumed "achievers" is very well crafted. She has also embedded skillfully a couple of modern theories about the functioning of the brain, which are an interesting read, but lack somewhat substance. On the whole it is an interesting read but the writer falls into the trap of taking the audience for too stupid to understand the theories to their full extend: a real pity for a very interesting topic. As far as the narator is concerned: once you get used to the voice, it makes the story real as the softspoken voice reminds you that it is indeed a story of an intravert. Yes, I have learned something from the booK : extraverts & intraverts : it is the right mix that brings the real power.