What is the purpose of a table of contents\

If a book is long enough to include chapters, then a table of contents will likely appear at the beginning of the publication. The TOC provides a sequential list of a book's organizational structure -- most commonly denoting each chapter's number, title and starting page location. The chapter titles listed in the TOC can help guide readers in finding specific sections; when the chapter titles don't provide specific enough detail, readers may need to consult the index found in the back of the publication

"teotihuacan was the cultural center of the zapotecs".