I wrote all of my own tools. The book itself is written in Markdown, and I use the Redcarpet gem to turn it into HTML. From that, I convert it into PDF and the

I wrote all of my own tools. The book itself is written in Markdown, and I use the Redcarpet gem to turn it into HTML. From that, I convert it into PDF and the ebook formats using Docverter. http://www.docverter.com http://www.docverter.com