The best way to learn AS 3.0

Hi! All,

I’m a web disgner, and I really want to learn and master AS 3.0. I only know a bit on AS 2.0 scripting in flash. What is the best way to master AS 3.0 in Flash?

I have read many tutorials on AS 3.0 online, but still not getting much from there. Is there any excellent book or learning material I can get from anywhere?

Please help! Thank you very much!! :x