I'm still working on my own paycheck and it is getting lonely, fortunately I have a cat that keeps me company during the day when the ol' ball and chain is earning our bread and butter. I think chapter 5 will become available soon. I haven't heard back from our editor that it is in need of some tender loving care, so that is promising.
I uploaded my third revision of chapter 6 yesterday and I hope to get some feedback today or tomorrow (she is fast). Chapter 6 is about the basic components: displaying text, linking to pages and documents, linking to actions and using the basic repeaters. It is hard to make such a range of topics readable and keep it together. Basically chapter 6 is 5 separate chapters crammed into one.