XHTML is a combination of HTML and XML, so I would like to learn XHTML in an advanced manner. I have some superbly written beginner books for XHTML which I have read, so I am quite familiar with it. However, now I am looking for an advanced book on XHTML and CSS as well. I also know what Cascading Style Sheets are all about and also know its basics.

I am basically looking for 1 book which would cover all aspects of XHTML and CSS, I wouldn't mind separate books for both these topics either. Can you please tell me?

For CSS, I know I can get the below given book:
http://www.sitepoint.com/books/css2/toc.php
I am considering purchasing it, but any alternatives?

And please, no ebooks!

Thanks for any recommendations!