Writing in AsciiDoc Atlas supports writing in AsciiDoc in addition to HTMLBook. Files ending in .asc or .asciidoc will be converted to HTMLBook when building. AsciiDoc is a text document format for writing (among other things) books, ebooks, and documentation. It’s similar to wiki markup—if you can write a Wikipedia article, then you’ll have no problem with AsciiDoc. AsciiDoc files in Atlas can be