I develop in C, Assembler, PHP, javascript, HTML4/5, XML, C++, etc. Have been doing hardcore development for 30 years. I bought this Flash book to learn Actionscript to gain power from the language. Quite honestly, this book is incomplete at best. No function/method reference. No class/structure reference. Much of the code is incomplete or outright wrong (fails syntacticly). In may cases they don't even cover important arguments in calls made that tell you whether or not functions succeed or fail. Topics of importance and depth are covered with so little useful information as to make this book useful only as another log on the fire.