I bought the Early Release of this book a couple months ago. The book does a good job of introducing MVC concepts and how they can and should be implemented in a JavaScript web app. Even if you have a background in RoR, Django, CakePHP, etc., the best practices for implementing the MVC concepts client side should prove helpful.
The most worthwhile part of the book - for me - was maccman's coverage of three popular JavaScript MVC frameworks: Backbone, Spine, and JavascriptMVC. The coverage included the basics of how each framework worked, as well as sample apps for each. Other gems included dependency management options (module loaders) and testing client side apps.
My only complaint - and one that maccman can't be faulted for - is the book covers a topic that's rapidly changing. There's few de facto client-side frameworks for MVC or dependency management or maybe even testing. Personally, I think that makes this more exciting, and the book does cover the current state well.
The most worthwhile part of the book - for me - was maccman's coverage of three popular JavaScript MVC frameworks: Backbone, Spine, and JavascriptMVC. The coverage included the basics of how each framework worked, as well as sample apps for each. Other gems included dependency management options (module loaders) and testing client side apps.
My only complaint - and one that maccman can't be faulted for - is the book covers a topic that's rapidly changing. There's few de facto client-side frameworks for MVC or dependency management or maybe even testing. Personally, I think that makes this more exciting, and the book does cover the current state well.