https://www.gitbook.com/ allows you to combine repositories on https://github.com with a simple to use WebUI for writing books. As result, your crazy content in your README.md (or whatever *.md) files will become available for your customers as book in form of a pdf, epub or mobi download.

This hackweek project is about to learn new things and try to do something useful by collecting all my former experiences in a book that is on my TODO list since more than 10 years now:

https://www.gitbook.com/book/lrupp/squid-buch/