Bookish

Before we round out on the book and start looking at its distribution and so forth, I will mention the half title and frontispiece; the title page and the colophon.

For that matter, I don't know how I missed the dedication, the epigraph and the prologue.

Apart from the colophon which may appear at  the front or the back, these mainly appear at the start of the book, with the introduction. This is known as front matter.

Then there's the back pages, known as back matter (end matter)
This includes the afterword, epilogue, conclusion, postface (which sounds like an insult) and a number of things we have canvassed.

Not all these features of front and back matter appear in every book. That will depend on what sort of book it is. An introduction to a scholarly work and a prologue to a story. Epigraph optional.

We somehow got through a couple of posts on the appendix without mentioning its synonym the addendum; a greater sin that not noting the foreign editor - who probably works for the paper anyway - or finding out what subeditors do.

We've covered most of the body matter; though I hadn't thought of modules and units as being part of the structure of a book.
I haven't repeated Extro or Outro on the grounds that the definition is more often associated with closing out a music piece.