Part 2 (this is where i am now in my reading) talks about the techniques to employ for coding the client and the server. Comprised of 2 chapters.
Part 3 (which i am yet to read) discusses about enhancing user experince (usability stuff that you should consider while developing AJAX application), security and performance of AJAX application. Comprised of 3 chapters.
Part 4 provides example applications using AJAX methodology like Dynamic double combo, type-ahead suggest, web portal with autosave functionality, live search using XSLT, and building a standalone RSS Feed Reader. Comprised of 5 chapters.
- DWR: Direct web remoting is an application framework which allows Java objects to expose their methods directly for AJAX requests to clients.