Install node and npm

Install gitbook-cli: https://github.com/GitbookIO/gitbook-cli

Clone this repo: https://github.com/IWT-Book/Book-Master.git

Setup the local book:

IMPORTANT: In book.json, you need to change slideRootPath to the following. "slideRootPath": "/Slides"

NOTE: This WILL break the gitbook site version if you push it, so try not to commit that file. If you do by accident, change the book.json on the live server to be "slideRootPath": "/iwt-master/content/Slides"

Run book

To update the layout of the page, modify the files in node_modules/gitbook-plugin-theme-iwt/_layouts/website. This can only be done while running locally.

To update the css, modify website.css. This can be done on the gitbook site or locally. To see all the regions/classes that gitbook provides, you can view node_modules/gitbook-plugin-theme-iwt/src/less/website OR you can update the .less files at node_modules/gitbook-plugin-theme-iwt/src/less/website.
Unfortunately, it only seems like the changes take hold if you publish the plugin and update the version. No way to test locally so probably better to use website.css.