CSS book recommendations?

I’m soooo sick and tired of tweaking and playing with CSS to acomodate all browsers.

When I learned CSS i just went through some online tutorials and learned what does what. But when I try sometimes something like margin-top:20px it just doesnt work specially with nested divs. im soooo tired of trying to please all browsers but i know i have to do that.

some people seem to do it very easily in a short time. css its not my specialty. so if you know of a very good book about css please let me know.

i was thinking on getting some books from sitepoint. but i recently bought two php classes book from them: the php anthology object oriented php solutions volume one and two and they totally suck! so im not sure about buying from them.