I built the Atlas system that O'Reilly uses to produce books, along with a Markdown and Asciidoc converter to HTMLBook. So even though you write in Asciidoc or

I built the Atlas system that O'Reilly uses to produce books, along with a Markdown and Asciidoc converter to HTMLBook. So even though you write in Asciidoc or Markdown, it gets converted to HTMLBook since that's what the entire toolchain understands. But those formats are great for the authors wanting to write in a plain-text alternative.