Moving endnote to a new chapter (document) at the end of the book and preserving the reference numbe

[Strabon]

I'm working on a book with 20 chapters (documents) and lots of endnotes. The endnotes are chapter-specific and come at the end of each chapter. They start at number 1 in each chapter.
I would like to change that and move all the endnotes to the end of the book, to a new chapter called Chapter 21: Endnotes.
When I move the endnotes to chapter 21, their reference number is changed to <?>. I can change <?> to continuing numbers, but when I delete the original endnote frame after having moved the endnotes to chapter 21, I lose all reference numbers in the text frame.
Is there a way to move the endnotes to a new chapter (document), without losing the reference numbers?

[Barb Binder · Accepted solution]

No, at this point in time, endnotes will appear at the end of each chapter. You are not alone in wanting them at the end of the book: https://indesign.uservoice.com/forums/601021-adobe-indesign-feature-requests/suggestions/37165906-en.... You can vote up the feature request by logging in with your Adobe ID and clicking the vote button. 

However, one of our moderators, Peter Kahrel, has a number of footnote and endnote scripts, including a footnote to end of book notes script. See https://creativepro.com/files/kahrel/indesignscripts.html. If a script works for you, consider a donation using the link on his page. 

~Barb