This book discusses using single page applications (SPA) in Web development. The use of SPA allows the user to load a Web site once and all the interactivity is handled fluidly by a rich JavaScript front end. Part I lays the groundwork for SPA development, including SPA architecture, JavaScript development techniques, modules, routing, and MV* frameworks; part II covers building the client for the application and using the Backbone.js library; part III covers the process of building the server side of the application using ASP.NET Web API, and hooking up the two parts of the application to create a working whole. The book also discusses tracking history, user interface performance, and how to handle search engine optimization. This book is for Web developers familiar with HTML, JavaScript, .NET and C#