O'Reilly offers early access to the book "JavaScript Web Applications" by Alex MacCaw. Final release is September 2011. A portion of O'Reilly's description of the book follows:
Building rich JavaScript applications that bring the desktop experience to the Web is now possible, thanks to powerful JavaScript engines and the CSS3 and HTML5 specifications. The key is moving state from the server to the client side; but that's no simple task.... Explore MVC and how to best structure and manage dependencies inside your application. Get an introduction to templating and data binding....
This is extremely compelling.