Merging Google Doc Chapters Into One Document

I’m nearing the completion of my first novella written in Google Docs and I’ve already started dreading the eventual cutting and pasting session to merge all my chapters into a single document. A bit of Googling and I found a spreadsheet that contains a script to merge documents based on their Google Document ID. Here is a link to the script. This script makes it far easier to merge than cutting and pasting. In fact, as I add a chapter, I add the ID to this spreadsheet and simply click a button to get a new merge.