I was thinking the same thing as Alex Hanson-White. The folds, letters, and the Quill on the book are enough details, it's pretty obvious that there are more pages. Plus, if you were to pixel the individual pages, it would seem like a rather small number compared to what could be imagined to be a fairly big book without those lines. I think it's probably the Quill that needs some detailing, but not the individual pages. In any case, I love how you did that page fold.