Do you mean Part I, sections 1-6?
I was going to start on Programming Phoenix next, so curious why specifically you think 1-6 of this book should be read first - does PP kind of throw you into the deep end?
Like the sound of that - would be good if the book details how to use Ecto as per PragDave’s thoughts in his course as per Discussion: Don't add a database layer to your Phoenix application 
