Barry, I am going to overlook that it seems like your response reads a bit on the sarcastic side. Completely unnecessary.
Otherwise, thank you for your help.
What has finally made sense to me is that a word processing document has a text box and a page layout document also has a tex box. To me, they look the same but now I am clear they operate differently.
Viking said, "All of the Book templates are Page Layout documents which have no body text, and depend on Text boxes to hold placeholder text. Although to a limited extent, you can apply existing and new paragraph styles to the Text box content, you cannot generate a Table of Contents from that Text box content."
Viking, I apologize that I didn't understand the difference between placeholder text vs body text inside a text box related to a page layout vs word processing document. To me, placeholder text seemed to appear the same as body text. Viking, thank you for your due diligence in trying to help me understand.
Barry, I appreciate the clarity.