Compiling one document from a number of files, all with endnotes.

Hi @thomd61141163:

Endnotes position is limited within InDesign's feature set. You have two options, outlined below:

—https://helpx.adobe.com/indesign/using/endnotes.html

You won't be able to automatically put them at the end of a book, but using individual book files but you could either place all 17 chapters as 17 sets of individually threaded text frames in a single .indd fle and set the scope to Document, or place all of them into one threaded text frame (using a paragraph style to force each title to the next right page) and leave the scope set to Story. 

Alternatively, you can take a look at a free script from our own Community Expert Peter Kahrel that will allow you to use a book file, as suggested by @davecourtemanche: 

https://creativepro.com/files/kahrel/indesign/footnotes.html. Scroll down to End-of-book notes and see if that will work for you. 

~Barb

Use the Indesign Book document (File / New / Book) to compile your chapters.