Thanks for the description of leanpub. In the last year and a bit, I've had a couple of people approach me for help with their book ideas. (Serious ideas -- both have significant, expert, and fairly unique domain specific knowledge.)
They are also people who would benefit from a simple, content-oriented editing environment.
They are also people who would benefit from a simple, content-oriented editing environment.
I / We'll be looking further at leanpub.