Strange and repetitive, but I suppose if you want to know more about moulding profiles (you don't) this is the only place to go.
It did give me some perspective on why these little ubiquitous carvings are made the way they are; just little rules on variation, rhythm, shading, and shape help explain why humans find some pleasing and others not.
That said the book is already almost 90 years old and so many of its theories on the origins of moulding profiles are out of date. But what self-respecting architect today is going to come along and write a book on moulding theory to argue with him?