This free book is what I wanted when I started working with single page apps. It's not an API reference on a particular framework, rather, the focus is on discussing patterns, implementation choices and decent practices.
I'm taking a "code and concepts" approach to the topic - the best way to learn how to use something is to understand how it is implemented. My ambition here is to decompose the problem of writing a web app, take a fresh look at it and hopefully make better decisions the next time you make one.
Update: the book is now also on Github.
Introduction
Writing maintainable code
- Maintainability depends on modularity: Stop using namespaces!
 - Getting to maintainable
 - Testing explained
 
Implementation alternatives: a look at the options
Meditations on Models & Collections
- Implementing a data source
 - Implementing a model
 - Implementing a collection
 - Implementing a data cache
 - Implementing associations