title_body: How to build ebooks from O'Reilly Atlas Projects?
upvoted_answer: First, kudos to learning about a new tool. (I never heard of it). 
  
  The content creation environment is in closed beta, so I wouldn't expect there to be any way to access the source code. 
  
  But the reading portal lets you view the full HTML which is generated by the HTMLBook source. I'm guessing that they have a tool to import asciidoc into HTMLbook, but I'm not sure if it only imports a subset of ASCIIDOC elements. 
  
  I think the whole point of Atlas is to make it unnecessary to have access to the source code, and to provide readymade templates and styles. Building for epub, pdf and mobi is complex, and it would be hard to recreate their toolchain on your own production environment. 
  
  Based on the video I've seen, it looks very impressive and hopefully will be a single source competitor to Adobe Indesign. It's unclear whether storing the source on the cloud will allow you to download an offline copy of the source.
  
  I'm struck by the similarities between Docbook XML and the elements created through the editor. (Indeed, I suspect HTMLBook is based upon it). Even if you downloaded an offline copy on source, I'm unsure how you would build it yourself; (for example, it seems that Atlas uses a commercial  PDF processor from AntennaHouse, which most people wouldn't have a license for).
  
  One thing is clear though. If you have access to the HTML output, you could probably import it into some desktop ebook creation tool and change the styles as necessary. The generated HTML is very clean, so I would expect it not to be that painful. 
  
  One example of a down-and-dirty export is to paste the HTML output into a MS Word doc, make sure the images are all there and then convert it into a PDF.