Market_Desc: Primary audience: (Job titles i.e. network managers, programmers, etc.) Web application programmers, XMPP developers. Readers should be familiar with JavaScript, the DOM (document object model), HTML, some CSS and AJAX.Secondary audience: Any developer interested or curious about XMPP, Web applications, publish-subscribe, or real time applications Special Features: " Programmer and web developer audience: specific to programmers and developers; complete step-by-step; huge time-saver for programmers who do not have to write extra code to create robust, secure, real-time applications " One of the first books to market: only one other book XMPP: The Definitive Guide from ORA, has been announced (5/4/09) which covers the protocol, but little actual programming. This book's focus is on the programming." Solid author credentials and platform: the author is an expert in XMPP. He is very active in the community with his blog: http://metajack.im, Facebook and Twitter, as well as his reach to the community through his Board position on the XMPP Standard Foundation About The Book: Professional XMPP starts off with a brief overview of XMPP followed by an overview of XMPP powered Web application architecture. Once those building blocks are in place, the reader goes through implementing a series of more and more sophisticated applications which exercise various parts of the XMPP technology stack including a simple chat application, a microblogging client, a shared browsing project, collaborative editing, and a game. The book concludes with some technical details on the XMPP to HTTP bridge and a few advanced topics like scaling and latency.