Tips for AS reference books

Hello everyone,

I’ve been working with Flash for some time now and I encounter the same diffeculties in every project that I do with it; I spend a lot of time figuring out actionscript on what it might do or what I think it should be able to do. This costs a lot of time and I’m sure that my AS-coding can become much ‘smarter’ if you know what I mean.
Therefore I’m looking for a good book on AS2.0 or a good Flash MX2004 book which has the AS covered. The problem is that almost every book I’ve had in my hands about Flash is too simple. Just basic tips and tricks really.
Does anyone know some good book-titles?

thanx!