Received a copy of this book at work when I was first starting out with ActionScript. At the time it was a bit over my head, but as I’ve gotten farther in ActionScript 3 this book has been a pretty constant companion as a reference.
It’s a very good book when you’re ready to get things moving in Flash without using the timeline and tweens and goes through different techniques to move on paths – circles, ovals, waves, etc.
But my personal favorite part is that at the end of each chapter is a quick review of any formulas and algorithms used in the chapter. It works well as a quick review, but is also a good place to start if you know what you’re looking for. Only catch is that I wish that the author had included page numbers with each formula in the back of the chapter to make it easier to find the longer explanations.
Amazon has Foundation ActionScript 3 Animation: Making Things Move available for about 30 bucks.