Ok, a couple of questions here (probably a better idea to start new threads for each question)...
@Roland: No, that's not a topic I cover in this book (at least not in any direct way, and probably not even indirectly either). I don't have any recommendations for anything I've read myself unfortunately.
@matiaZ: This book isn't really for beginners, so it may not be the best choice. That being said, my previous books, which also were not designed for beginners, have actually helped a number of beginners that I've spoken to, so it's not impossible. I'd say if you have some personal motivation and can take detours every now and then to look up stuff that you'll need to understand along the way, it *might* be OK, but it's not truly written with beginners in mind.
@Stephane: I don't cover integrating in an existing app specifically, so it wouldn't directly help. That being said, there's certainly some good information in there that you may be able to apply yourself.
@Mita: See my answer to matiaZ above
-- <br />Frank W. Zammetti<br />Founder and Chief Software Architect<br />Omnytex Technologies<br /><a href="http://www.omnytex.com" target="_blank" rel="nofollow">http://www.omnytex.com</a><br />AIM/Yahoo: fzammetti<br />MSN: fzammetti@hotmail.com<br />Author of "Practical Ajax Projects With Java Technology"<br /> (2006, Apress, ISBN 1-59059-695-1)<br />and "JavaScript, DOM Scripting and Ajax Projects"<br /> (2007, Apress, ISBN 1-59059-816-4)<br />Java Web Parts - <a href="http://javawebparts.sourceforge.net" target="_blank" rel="nofollow">http://javawebparts.sourceforge.net</a><br /> Supplying the wheel, so you don't have to reinvent it!