O'Reilly Atlas looks really interesting but the "email for a quote" thing really puts me off. Leanpub offers something really similar but it pretty much locks

O'Reilly Atlas looks really interesting but the "email for a quote" thing really puts me off. Leanpub offers something really similar but it pretty much locks you in to their platform to unless you want to publish through them it's not really an option. A self-hosting option for this type of software, open source or not, will be really nice.