While this book doesn't quite dive into advanced topics such as creating 3d engines or complex math formulas in actionscript, it does a GREAT job of introducing actionscript to someone who is already competent in Flash.I've had a good amount of Flash experience, designed a few sites in all-flash movies...but never did much with Actionscript. This book claimed to be a good startup...and it is!If you know some Flash and have been just a bit confused about understanding levels, movie clip timelines, and complex actions and how you can make them all fit together, this is the book for you!