I highly recommend to the many exalted ebookmakers on here the following PDF (formatted for the computer screen and/or printing):
memman.pdf
While technically it is the documentation of a particular LaTeX package, the first part entitled "Art and Theory" is an exceptionally good and fairly easy to understand guide to typesetting and bookmaking.
The only thing to keep in mind is that this guide is for making paper books. In other words, sensibly ignore/modify its counsel on margins and leaving empty pages to suit the eBook medium.
- Ahi