Rating: 

I must agree with one of the reviews below, that I missed the guide words at the top of the pages, but the index in the back of the book covers for it quite well.

One other thing I liked quite well is that the book tells you with what browser the CSS will work. Downside to that is that it doesn't tell what version. It just says Internet Explorer, but not if it'll work with 5.5, 6.0 or 7.0

All together I can conclude that this is a very good reference. It's more complete and easier than the W3Schools website. It's easy to use and very complete.