I know this is tangential, but I would love for someone to talk about writing a more visual type of book, full of images, tables and charts for the business world. A table like the one in the first screenshot of this post works well because the author is not repeatedly iterating on it, there's very little text and information flows top-to-bottom very neatly. That's great, but it's also extremely basic. Take a look at…
I like the idea of using open-source tools to create books and documentation because you could incorporate the process into a workflow that pulls in actual code or on-the-fly generated graphics. I don't own any commercial software, so I don't know how feasable that process would be with something like InDesign.