What books are good for those learning actionscript

I guess the content of my other post is a little tricky as no replies yet on how to pass variables into and out of a Flash script.

However I would be interested to know what books on actionscript other members here would recommend... is there a book that you've found particularly useful for a beginner?

Ideally something that shows you how to perform different tasks and with mini projects to build so that you feel you've achieved something once you've mastered the techniques would be ideal.