The method, in two paragraphs

A good non-fiction book is usually answering a handful of questions, and the rest is evidence, examples and repetition. So every book here is reduced to the five questions it actually answers, in the order it argues them, and each question gets one short piece. The pieces are written from a close reading of the book and nothing else. No outside research, no updated statistics, no opinions the author does not hold. Where the book tells a story we keep the story. Where it cites a study we say it is a study the book cites. Where the argument is thinner than it sounds, we say so.

Then each piece is narrated, and the word being spoken is lit as you follow, so you can read it, listen to it, or do both on a train. Four minutes to read, six or seven to listen. If a piece makes you want the book, every book page links to where you can buy it, which is the outcome we would prefer. This is commentary rather than a substitute. The point of a summary is to help you decide what deserves the eight hours.