Is a excellent book about a excellent framework, Its help you to introduce at the fascinating world of Backbonejs & Marionettejs, Each chapter covers the basics in a very concise way and moves on to more useful concepts and examples applicable to developing a real world application.
The book start with the basic, Router, Views, initial application, for test purposes. Continue with great chapters about how to manage many views on the same page, regions , and how to make a modularity app, thinking on grow in the future. There are a great chapter on using AMD with require.js.
In summary: i am very pleased whit this book, and is a good start to learn about this framework.