A work in progress book building system. BookMarkDown is very much alpha quality software. It works, but can be fickle and there are some rough edges. That said, it works, and is continually being improved.
There is currently one theme, and it only creates HTML output (PDF, and eBook support in the works).
Documentation is available to help get you started.
Installing BookMarkDown is easy if you already have node.js and npm installed:
$ npm install -g bookmarkdown
Creating a book is easy. You can initialize a skeleton book with a single command:
$ initbmd myBook
This will create a new book in the myBook directory. This creates a book.json file and a couple of sample chapters.
$ bmd2html --book book.json