If you tap the lower black portion of your screen, it will tell you your chapter, show your progress on a slide scale and how many pages you are into your book.
I keep my brightness to the max and my page never goes dim. I have my set on 5 mins.
1.) Go to Settings- General-Screen Timeout- and select the minutes that you want to keep your NOOK HD + on before it goes dim.
2.) Point your finger before the page numbers and a gray should appear and it will let you know how many pages are there in the book.
Hopefully this helps you.