Dennis Groves called my attention to the really interesting/powerful online publishing leanpub.com website/service (which he is trying for publishing OWASP books).
I just tried with the content from this blog, and as a first pass, I'm quite impressed with the results.
To get the 934 page pdf (or EPUB/MOBI file) for this blog:
1) open https://leanpub.com/DinisCruz_Blog
2) click on the Buy the eBook now! (above screenshot):
https://leanpub.com/s/1pw_yo3298HPxkBdcUWsRY.pdf (not sure if it is user session specific))
You will also get an email with the download link:
And the created Pdf doesn't look that bad :)
LeanPub's creation/edition model is based on DropBox, but what would be really useful (and practical) would be to have the content (and its version-control) managed by Git/GitHub (Dennis Groves is trying to figure out how to create that workflow)