Every style guide and reputable example I know of makes me think it should be:
[no number or title] front matter Chapter 1 Chapter title Chapter 2 Chapter title Chapter N Chapter title Appendix A Appendix title Appendix B Appendix title Appendix N Appendix title [no number] Glossary (optional) [no number] Index When I have to use chapter number prefixes for figures or pages, I omit the prefix in the front matter, use the chapter number or appendix letter for pages in those components, and use Y to prefix the Glossary pages, and Z to prefix the Index pages, based on the fact that those are the last two components in the work, thus get the last two letters. Bear
