The author is pretty much in agreement with you. From the preface: > These notes are more journal than book. You’ll find lots of duplication, since I reworked

The author is pretty much in agreement with you. From the preface: > These notes are more journal than book. You’ll find lots of duplication, since I reworked some topics from scratch a number of times. In many places I was attempting to learn both the basic physics concepts as well as playing with how to express many of those concepts using GA formalisms. The page count proves that I did a very poor job of weeding out all the duplication. These notes are (dis)organized into the following chapters