Depending on your preference or how you choose to write your book, the following tools and their corresponding documentations will apply:
Method 1: In-browser editor
Here's a quick tutorial to help you get started on it.
To deep dive head over to our Official Handbook.
Method 2: Bookiza
Bookiza is an open source book reification framework, or simply a "book baking" tool, that lets you create and publish superbooks from the comfort of your computer. Publish (push2deploy) directly to Bubblin or on your own custom domain easily.
In comparison to the in-browser editor described above, Bookiza is a much more lower-level professional writing tool that manages your manuscript smartly - like it were an app - and lets you collaborate with your existing development toolchain.
Visit site http://bookiza.io for more details and setup related information.