I've Read the Fourth Edition, and It's Your Star

There are a lot of references to coved in this fourth edition, which is one thing i wanted to ask you about. Is it very evident thatike, this whole thing was rewritten for the fourth edition? Or is it more like, what was that book we read, bowling alone? You know, where there's the adendum at the back? This ones, it's kind of its two things. It's kind of spread out through the book, so there is no separate piece to it. But there's also a new preface to the fourth edition.