Ask HN: Does a smart tool for book drafting exist (analytics per chapter, etc)?

I'm looking for a tool with the following features.

I'm using it to get really advanced analytics for a book I'm drafting.

- See analytics (i.e. where each reader drops off/retention, how frequently they re-visit a section, most highlighted/copied sections, etc) on a per-user basis (therefore, login required)

(On a per-user basis so that I can reach out to and have phone/Skype conversations with the readers that most loved it and learn more, and the readers that didn't love it, and also find out more)

Any suggestions that don't involve me having to program something myself (i.e. I could set up a rails site, add twitter authentication and some kind of per-user analytics, but I have to imagine there's something easier for this)?