HTML Styles

Question:  Do you know if there are any texts available to the public on
HTML Cascading Styles?  I would like to purchase a well written,
user-friendly book and learn more about it since styles are going to
play a very important role in future Web page development.  If you don't
know of any texts, can you suggest some good URLs on the Internet that
explain cascading styles well.

Thank you for your time.

--Ron Whitaker--