This is a short book. Amazon count 204 pages, but I reckon that if you only count pages with stuff to read on, there aren't much over 100 pages. So I was a little amused when the authors stated that they expected you to read the book in a week or two. 3 days at a push more like it.
So, it's clearly not a subject that is amenable to inspire a 1000 page tome. There are quite a few cartoons which, depending on your point of view, pad out the pages or add some levity.
I felt that the authors were struggling to stretch the idea to fill a book. The advice on 'plain English' for comments and variable names is sound. I wasn't sure sometimes whether the ideas about refactoring were 'readability' issues or just simply better code.