OK, done! Sorry about that.. and in my short few days browsing WordPress forums you've had to tell so many people to do that, thanks for your patience.
Yes, I guess I'd love 2 Navbars... if possible?
It could be top and top or top and side, with "chapters" or "Headings" up top, and individual pages linked to them down the side. I notice you have widgets like links and categories, do they work in a similar way?
Anyway, my Navbar layout would ideally be something like this... (not actual names, just showing to illustrate). So the Master Navbar is at the top, and the "minor" page Navbar on the side. In this case I would have clicked on the 2nd "Chapter 2" main heading, and the Bottom Page under the main heading.
Main Navbar: CHAPTER1 CHAPTER2 CHAPTER3 CHAPTER4 CHAPTER5 CHAPTER6
Sub-Navbar
Chapter2:Page1 Content of Chapter 2 page 5 displays about here
Chapter2:Page2 Content of Chapter 2 page 5 displays about here
Chapter2:Page3 Content of Chapter 2 page 5 displays about here
Chapter2:Page4 Content of Chapter 2 page 5 displays about here
Chapter2:Page5 Content of Chapter 2 page 5 displays about here
Content of Chapter 2 page 5 displays about here
Content of Chapter 2 page 5 displays about here
You get the idea.