If you want to invest some time on HTML5, choosing a nice MVC framework is your first challenge when you will start developing. Backbone is one of the available solutions out there. Its documentation only consists of its API which could be uneasy at first glance.
Thanks to Addy Osmani, a book explains the basics and the philosophy of Backbone.
It's pretty well written and I like to come back to it whenever I'm not sure to take the proper approach of design.
The book is available for free reading on Github : http://addyosmani.github.io/backbone-fundamentals/ and it's definitely worth buying it if you enjoy it as much as I do.