That is totally up to you. You can write your book and push changes to GitHub, store the book files in your Dropbox directory, tempt fate and just store them lo

That is totally up to you. You can write your book and push changes to GitHub, store the book files in your Dropbox directory, tempt fate and just store them locally, etc. Softcover just pulls in the HTML and eBooks that are compiled from the source code, as well as the book config files, and generates the views and links.